Database Users

battery life concerns on wizard

I've had an o2 mini s for about a week now and i'm pleased with it on the whole. My only real concern is battery life. My mini seems to drain much quicker than by xda 2 s which I had before. I seem to drop about 10% in 1 hour 10 mins and that's just a few calls/txts and minimum fiddling.
8:20 100%
9:42 88%
I've dropped all the o2 software and don't have any tricky 3rd party apps installed only;
xbar3 ( great btw )
avantgo wireless
ebook reader
tcpmp
I've read quite a few posts about battery life being good on this phone but i'm not seeing it. I'm still in my 14 day cooling off period and i'm considering sending it back for a replacement.
Jeff

Is Wifi off, bluetooth off. Do you check your email every ... minutes over GPRS?...
With email checking every 10 minutes my qtek battery last at least 2 whole days.

wifi/gprs/bluetooth all off - not used today
Just phone today - maybe 12 calls.
Time now 14:21 battery at 61% !
Now i'm worried ......I reckon i'll be down to 30% by this evening.

16:32 - 49%

maybe there are problems with these batteries i had problems with charging the battery it didnt seem to show correct level, sent it back for another unit

17:26 - 38%.
If another goes we'll be up here all day.

My battery life seems to be utter rubbish every time I charge my MDA Vario over the USB link. I can go to bed with 100% battery and find it dead by morning. This has happened two or three times since I bought it on 5th November. Last Saturday morning I had the USB cable connected to download some music to my SD card with 100% charge at 10:00. I played music for about an hour through the supplied headphones and by 13:00 I was down to 50% battery. By that evening I was down to a few %. I've read reviews that you you should squeeze about 10 hours of continuous music from this thing on one full charge so an hour of music and 7 hours of standby/sleep seems pathetic.
If I charge using the mains charger and sync over Bluetooth I get a standby battery life of about 5 days. Obviously that is shortened with use so in practice I am charging it every 2-3 days (no point starting a day with only 20% left!).
I have no idea why USB charging is completely hopeless. I have tried soft resetting or closing all active apps after charging, to make sure ActiveSync isn't actively running and causing a drain (just as you are advised to with a Bluetooth sync) but that seems to make no difference. USB charging is rubbish. Mains charging is the only way to go, IME.

21.50 - 24 %

Charging over USB hopeless
tdodd said:
I have no idea why USB charging is completely hopeless. I have tried soft resetting or closing all active apps after charging, to make sure ActiveSync isn't actively running and causing a drain (just as you are advised to with a Bluetooth sync) but that seems to make no difference. USB charging is rubbish. Mains charging is the only way to go, IME.
Click to expand...
Click to collapse
I confirm USB charging IS rubbish. The reason seems to be that the power available out of that conector on a PC is not enough to charge properly... I had the same issue with BA and Himalaya...
Answer: get a USB charger / car charger that can deliver 1A minimum.
BTW I found a craddle for the Wizard in Dubai @ Plugins. It comes with USB port/cable + power adapter. Works like a charme.
Cheers,
Hal.

tdodd said:
My battery life seems to be utter rubbish every time I charge my MDA Vario over the USB link. I can go to bed with 100% battery and find it dead by morning. This has happened two or three times since I bought it on 5th November. Last Saturday morning I had the USB cable connected to download some music to my SD card with 100% charge at 10:00. I played music for about an hour through the supplied headphones and by 13:00 I was down to 50% battery. By that evening I was down to a few %.
Click to expand...
Click to collapse
My C500 Did that when I had it Plugged in the Front USB ports on my case, I normaly had it plugged in to the onboard USB at the back of my pc with a usb ext cable so I could have it on my desk but I went off to a lan party and when I plugged everything back in I put my USB cable to front usb port and found it was Discharging my Battery instead of charging it, got my usb in Back port all is fine again now
Maybe you have yours in to the front USB port or non onboard port?

I use a laptop, which only has two USB 1.1 ports but they each supply enough juice to power a USB ADSL modem (not that I'm using one of those these days), which is more than some PCs will manage and also my USB hard drive, which my Shuttle won't. So there is no lack of power from the USB ports on the laptop.
Of course, the USB spec only permits a maximum current demand of 500mA so any equpiment expecting more should not be using USB for its power supply. In any event, the phone does charge from the USB ports, albeit very slowly, but eventually the orange charge light does go green. So my situation is not one of discharging instead of charging.
I've just swapped my ROM from Vario to k-jam so I'll see if that makes any difference to the performance. I know it's given me 802.11g, which was missing before.

I had an M500 briefly (Magician) on Orange that had very poor battery life, it was one of the reasons I ebayed it, gave the contract sim to my wife and started a cheaper better value T-Mobile account with an MDA Compact, which
had better battery life. Typically overnight after a full charge the Orange unit went down to 75% and the T-Mobile one was at about 98% on standby.
My Vario I have now, my other T-Mobile account has very good battery life and charges very well off USB. If I sync it in the morning whilst reading my emails and stuff, let it charge USb for about 25 mins, it'll be full and by the night it will have dropped down to about 80%. This is with about 30 mins of calls, about seven or eight emails sent/received and maybe 15 mins with WIFI on.

tdodd said:
I use a laptop, which only has two USB 1.1 ports but they each supply enough juice to power a USB ADSL modem (not that I'm using one of those these days), which is more than some PCs will manage and also my USB hard drive, which my Shuttle won't. So there is no lack of power from the USB ports on the laptop.
Of course, the USB spec only permits a maximum current demand of 500mA so any equpiment expecting more should not be using USB for its power supply. In any event, the phone does charge from the USB ports, albeit very slowly, but eventually the orange charge light does go green. So my situation is not one of discharging instead of charging.
I've just swapped my ROM from Vario to k-jam so I'll see if that makes any difference to the performance. I know it's given me 802.11g, which was missing before.
Click to expand...
Click to collapse
do you have a link to the imate rom? is the vario rom also available?

sundip said:
do you have a link to the imate rom? is the vario rom also available?
Click to expand...
Click to collapse
I can't remember for sure where I got the k-jam ROM ( I think someone saved a copy somewhere) but try here - ftp://ftp.clubimate.com/ - and then save file K-JAM_WWE_1010903_106_10110_ship.exe
That is a self installing upgrade that includes the whole k-jam ROM and k-jam extended ROM files.
I don't know where to get a Vario ROM from. I did back up my own copy (I hope) but the method is a bit whacky and as I only have a 1GB mini-SD card my ROM backup image is 1GB because the only way to secure the image is to dump the whole card to a file.
Before you go playing around do make sure you have your own backup of the ROM or if not the whole thing then the Vario extended ROM files at least. I'm using the k-jam ROM with the Vario Extended ROM.

Re: Charging over USB hopeless
hal said:
I confirm USB charging IS rubbish. The reason seems to be that the power available out of that conector on a PC is not enough to charge properly... I had the same issue with BA and Himalaya...
Answer: get a USB charger / car charger that can deliver 1A minimum.
BTW I found a craddle for the Wizard in Dubai @ Plugins. It comes with USB port/cable + power adapter. Works like a charme.
Cheers,
Hal.
Click to expand...
Click to collapse
Hi,
Is there any way to disable USB charging? I didn't connect USB very often since it will charge automatically and I don't like the battery be charged very often. It might kill battery soon. I like to sync with bluetooth; however it is much slower than USB. It's amazing if there is any tool to disable USB charging. Because it will sync fast and will not hurt the battery. Thanks for the suggestions in advance.
Cheers!
Michael

Re: Charging over USB hopeless
Michael Lin said:
Is there any way to disable USB charging? I didn't connect USB very often since it will charge automatically and I don't like the battery be charged very often. It might kill battery soon. I like to sync with bluetooth; however it is much slower than USB. It's amazing if there is any tool to disable USB charging. Because it will sync fast and will not hurt the battery.
Click to expand...
Click to collapse
You are thinking of older batteries such as Nicads. Topping up often does not hurt Lithium batteries, in fact it's better for them. Their main enemies are deep discharge and heat - and that's exactly what you're subjecting it to by letting it run flat, then charging for hours to get it back to max.

Re: Charging over USB hopeless
Ineedtoys said:
You are thinking of older batteries such as Nicads. Topping up often does not hurt Lithium batteries, in fact it's better for them. Their main enemies are deep discharge and heat - and that's exactly what you're subjecting it to by letting it run flat, then charging for hours to get it back to max.
Click to expand...
Click to collapse
Dear Ineedtoys,
Thanks for the reply. I understand that there is no so called "memory effect" on Lithium battery; however when I checked the battery spec, I always found that there is a "charging cycle limitation". For example, a specific battery claimed that it can be rechaged 10,000 times, then very USB charging will be counted also. It will reach 10,000 times faster. This is my concern. I don't know if this is right or wrong. Can somebody help to clarify this?
B. Rgds.,
Michael

Re: Charging over USB hopeless
Ineedtoys said:
You are thinking of older batteries such as Nicads. Topping up often does not hurt Lithium batteries, in fact it's better for them. Their main enemies are deep discharge and heat - and that's exactly what you're subjecting it to by letting it run flat, then charging for hours to get it back to max.
Click to expand...
Click to collapse
Dear Ineedtoys,
Thanks for the reply. I understand that there is no so called "memory effect" on Lithium battery; however when I checked the battery spec, I always found that there is a "charging cycle limitation". For example, a specific battery claimed that it can be rechaged 10,000 times, then very USB charging will be counted also. It will reach 10,000 times faster. This is my concern. I don't know if this is right or wrong. Can somebody help to clarify this?
B. Rgds.,
Michael

Re: Charging over USB hopeless
Michael Lin said:
Ineedtoys said:
You are thinking of older batteries such as Nicads. Topping up often does not hurt Lithium batteries, in fact it's better for them. Their main enemies are deep discharge and heat - and that's exactly what you're subjecting it to by letting it run flat, then charging for hours to get it back to max.
Click to expand...
Click to collapse
Dear Ineedtoys,
Thanks for the reply. I understand that there is no so called "memory effect" on Lithium battery; however when I checked the battery spec, I always found that there is a "charging cycle limitation". For example, a specific battery claimed that it can be rechaged 10,000 times, then very USB charging will be counted also. It will reach 10,000 times faster. This is my concern. I don't know if this is right or wrong. Can somebody help to clarify this?
B. Rgds.,
Michael
Click to expand...
Click to collapse
That's true. It's the same with Notebooks. The more you charge it, while it's in use, the faster the battery gets "killed"!

Re: Charging over USB hopeless
Michael Lin said:
Hi,
Is there any way to disable USB charging? I didn't connect USB very often since it will charge automatically and I don't like the battery be charged very often. It might kill battery soon. I like to sync with bluetooth; however it is much slower than USB. It's amazing if there is any tool to disable USB charging. Because it will sync fast and will not hurt the battery. Thanks for the suggestions in advance.
Cheers!
Michael
Click to expand...
Click to collapse
Answer my own question.
I am quite sure that the USB charging can be disabled since I used to see the config on a HP device. I also believed that this can be done by 'registry' since it is Windows tradition. I finally found it after a short study. Please go to
HKLM\Drivers\BuiltIn\usbfndrv
and change the
EnableUsbCharging to '0'
then
soft reset => Bingo.
Hope it helps.
Michael

charging problems

Hi guys asked it once before in battery section, but no replies.
My HD doesn't charge auto, when I press the on button the battery charges for 15 sec. tried a new battery same result. I know it Physicly charges, when I charge the phone by pressing the on button a couple of 100 times (really 100x) I get 1% charge. So don't say 'HTC phones only charge when on', cause I know.. Tried a Hard reset 2 times no luck. meanwhile my batt. is dead. So I can't try other firmware.(need 50% charge min)
(chargers are fine)
In short, anybody ever heard of this problem before with other htc models/HD ?
Physicly it charges, so would a firmware change help?(then I need to get a standalone charger/new battery with charge).
My last option is to bring it to HTC but that would take a month
Sorry for number of words on this lazy sunday.
Update - firmware update doesn't work.. next is radio....

no ideas anybody?

Hi,
Unfortunately I dont know much other, then charge the battery in another HD up if available (maybe u can ask in a telephoneshop or so) and then test the Firmware changes.
Is the same if you charge it via PC/USB?

thx for the reply, did just that, changed Rom/radio, official and dutty's rom's, no change. No problem sync. have atleast 3 usb chargers none of them work. When connected to usb cable 2 lights blink 1 green 1 amber one after each other. just like a new message/ low battery even when battery has 50% I get the same light patern, (this is a new battery).
The thing is when the battery is completly flat it stil charges for 15 sec then it turns of. So when I charge it 15 (x15 sec) times or so I'm able to turn the device on again. But when it has (some) battery power the lights start blinking again and I'm completly unable to charge the battery.
The phone is almost 2 weeks old and charged normaly until I checked the "don't charge when connected to usb" option in the power menu. ??!

Then I think you wont get around, to send it back for repair.

have you tried to charge it with a wall socket or is this only when you usb to pc charge??

Jbvb said:
have you tried to charge it with a wall socket or is this only when you usb to pc charge??
Click to expand...
Click to collapse
I never charges, wall/usb doesn't matter.
I just used another HD battery to restore everything to default, So I'll guess I'm taking it back..
Thx anyway.

exact same problem
Did you get anywhere with this problem? I have been strugling with the exact same thing... I have tried all the same things as you, only sometimes it seems like it might be the battery contacts.. I havent been able to consistently get it to work but sometimes if I firmly press the battery against the contacts it will behave normally

philbrown23 said:
Did you get anywhere with this problem? I have been strugling with the exact same thing... I have tried all the same things as you, only sometimes it seems like it might be the battery contacts.. I havent been able to consistently get it to work but sometimes if I firmly press the battery against the contacts it will behave normally
Click to expand...
Click to collapse
Nope tried the contacts but they work fine, battery just won't charge, do your light also blink? (on the power button).
I haven't found any info on the web?!?:S

Problem is solved.. had to be sent back to HTC for repair, it took less then 2 weeks (door to door) so that was pretty fast. They swapped the mainbord, so I got my 'old' phone with a new imei.
So don't waste your time with software up/downgrades. It's a hardware problem.

I had a very similar problem.
Once my battery died some app hung system all night.
No charging at all wall charger and USB 1 day each and so many manipulations. The indicator blinks momentarily and then nothing. I didn't try (didn't know) the key presses like Dogtag. Did a hard reset still nothing...
Then thought about charging the battery with external (Lion) charger before sending for repair. I also shorted the battery compartment pins momentarily. To my pleasant surprise everything back to normal
So far no problems after that though I never drained my battery to zero.
Looks like something to do with corruption in battery calibration data - may not be in ROM?? who knows??

fantastic. can u elaberate?
hey Cragee
I did't understand what u did. Can u try to explane it to me one more time?
I'm realy excited about a posible soulution
hooray
ckraft
crajee said:
I also shorted the battery compartment pins momentarily. To my pleasant surprise everything back to normal
So far no problems after that though I never drained my battery to zero.
Looks like something to do with corruption in battery calibration data - may not be in ROM?? who knows??
Click to expand...
Click to collapse

Only two things I did can matter -
1. Charging the battery after taking it out (with a battery charger*)
2. shorting pins in the battery compartment after taking out the battery. (Warning: not on batteries)
Don't know which of the two worked.. No harm trying both anyway.
* U need a Li-ion battery charger - else invitation for trouble including fire and explosion.. These are available in electronics shop at a reasonable price.

Short-circuiting the battery pins... seems to work
I had the same problems with my Touch HD the last few weeks:
- stopped charging after a few seconds
- didn't charge at all (nor the wall nor the computer method, on or off)
- well... it charged sometimes but randomly, keeping it on a wall charger (on OR off) for a night could bring it back to 20% and then rapidly back to 0%
- no charging indicator in the screen while turned on
- blinking orange and yellow (?) light even while turned off
- charged almost never to full and 'jumping' from high to ultra low capacity when turning it on & off
So before bringing it back to the store i tried to short circuit the battery pins as suggested (while the battery and charge were unhooked) like the thing you would do to clear the CMOS memmory of a PC in the 'old days'
And for now it seems to work, at least the charging icon is back online!
I'll keep you posted on longer term results!
Update: I switched to the wall charger and the HD died again??? Now it's back on the computer and it seems to charge fine... why????

crajee said:
I had a very similar problem.
Once my battery died some app hung system all night.
No charging at all wall charger and USB 1 day each and so many manipulations. The indicator blinks momentarily and then nothing. I didn't try (didn't know) the key presses like Dogtag. Did a hard reset still nothing...
Then thought about charging the battery with external (Lion) charger before sending for repair. I also shorted the battery compartment pins momentarily. To my pleasant surprise everything back to normal
So far no problems after that though I never drained my battery to zero.
Looks like something to do with corruption in battery calibration data - may not be in ROM?? who knows??
Click to expand...
Click to collapse
When u say "shorted the battery" do u mean, turnoing phone off, taking battery out, connecting the 3 battery connectors with a wire for a few seconds?

....so what does shorting mean??

cxkx said:
When u say "shorted the battery" do u mean, turnoing phone off, taking battery out, connecting the 3 battery connectors with a wire for a few seconds?
Click to expand...
Click to collapse
I thing so. You should circuit the pins WITHOUT battery. In any other case it may occurs damage on the telephone

Dogtag is right... it's defenitly a hardware problem
As posted before...i had the same problem with my touch HD, charging was a pain or sometimes seemed impossible. The phone was repaired twice.
-First they replaced the connector - no succes.
-Second time the replaced the motherboard, and everything was solved.
So imho it's the mainboard of some machines, i still wonder if it's a factory problem or a 'fried' chip of some kind after a bad charging procedure? Bad USB car charger of some kind?

Portable Charger!

We (noordwyk & Me) managed to put together a Portable Charger for the Diamond. I have attached some pics:
noordwyk will soon post the diagram

Sounds cool anychance of some more info: Like what you used and a diagram to show how it's wired? Please.

When i get time I shall upload a graph

For everyone without soldering skills - there are plenty of portable external chargers for sale, even one from HTC:
HTC Battery Bank BB G300

i've bought a couple of portable chargers. Neither of them worked. In bothe cases i plugged them in and my diamond showed itself as being connected to a power source on the task bar. The light ring pulsed in the charge pattern also. However after a few minutes of "charging" once removed the battery level is lower than when i plugged it in. This is the case whether i had the diamond on or off when charging. Chargers work fine using different adaptors on other none wm phones. The thought i had was that the chargers were outputting enough to power the charging circuit but not enough to charge. This in turn is draining the battery. any thoughts ppl??

optiknerv said:
i've bought a couple of portable chargers. Neither of them worked. In bothe cases i plugged them in and my diamond showed itself as being connected to a power source on the task bar. The light ring pulsed in the charge pattern also. However after a few minutes of "charging" once removed the battery level is lower than when i plugged it in. This is the case whether i had the diamond on or off when charging. Chargers work fine using different adaptors on other none wm phones. The thought i had was that the chargers were outputting enough to power the charging circuit but not enough to charge. This in turn is draining the battery. any thoughts ppl??
Click to expand...
Click to collapse
Portable chargers and HTC don't go together. You MUST switch your phone off to charge it otherwise the PMS will get confused and keep changing power sources like External > Internal > External > Internal and so on. Just like a light switch when you turn it on it takes more power than just leaving it on for 10 minutes. Portable chargers have a charge rate of ~250 mA which is 1/4 of a Official HTC Charger.
Conclusion: If you want to use a portable charger ONLY use it after turning your phone off otherwise its USeLESS

mohamedhussain1995 said:
Portable chargers and HTC don't go together. You MUST switch your phone off to charge it otherwise the PMS will get confused and keep changing power sources like External > Internal > External > Internal and so on. Just like a light switch when you turn it on it takes more power than just leaving it on for 10 minutes. Portable chargers have a charge rate of ~250 mA which is 1/4 of a Official HTC Charger.
Conclusion: If you want to use a portable charger ONLY use it after turning your phone off otherwise its USeLESS
Click to expand...
Click to collapse
Is it the same for car chargers ? If so, how can we power the device for, say, using GPS navigation for long trips ?

mysterd said:
Is it the same for car chargers ? If so, how can we power the device for, say, using GPS navigation for long trips ?
Click to expand...
Click to collapse
Nope! Car Chargers work well. I use one regularly - specifically for the reason you mentioned- usage of GPS while on long trips.

mohamedhussain1995 said:
Portable chargers and HTC don't go together. You MUST switch your phone off to charge it otherwise the PMS will get confused and keep changing power sources like External > Internal > External > Internal and so on. Just like a light switch when you turn it on it takes more power than just leaving it on for 10 minutes. Portable chargers have a charge rate of ~250 mA which is 1/4 of a Official HTC Charger.
Conclusion: If you want to use a portable charger ONLY use it after turning your phone off otherwise its USeLESS
Click to expand...
Click to collapse
Basically what i thought then. I must be getting particularly rubbish ones because they dont even work when the phone is off. I gave up on them a few months ago and just bought a spare battery and charger. Quite cheap off ebay and a battery is a smaller item to carry than a portable charger.

mohamedhussain1995 said:
I managed to put together a Portable Charger for the Diamond. I have attached some pics:
Click to expand...
Click to collapse
I would be quite interested to see a wiring diagram of this too, it'd be great to be able to just grab a 9v and charge up on the run...

mohamedhussain1995 said:
a light switch when you turn it on it takes more power than just leaving it on for 10 minutes
Click to expand...
Click to collapse
is this true ?

lastnikita said:
is this true ?
Click to expand...
Click to collapse
Well its true in the UK

Shouldn't be too hard to build. Take one of these (high efficiency!), solder the 9V battery adapter and the mini-usb cable to it and your're done. Only thing I worry about is the capacity. You get NiMH 9V cells at approx 250 mAh. Given the battery voltage is 9V, you get a total energy of 8.1 kJ stored in it, which translates to 450 mAh at 5V (input voltage of device). Given that this back-of-the-envelope calculation does not take conversion losses in account, you can be happy if you get 20-30% charge out of it. Maybe you could wire several 9V batteries in parallel so you get more charge out of it. Which I am gonna try out right away .

lastnikita said:
is this true ?
Click to expand...
Click to collapse
No. MythBusters tried it out. Turning on an incandescent light bulb (60W I think?) uses about the same power as leaving it on for 17 seconds. Fluorescent light bulbs didn't use significantly more power to turn on.

smjoshi said:
Nope! Car Chargers work well. I use one regularly - specifically for the reason you mentioned- usage of GPS while on long trips.
Click to expand...
Click to collapse
Ok...
The only problem is that my Diamond seems to use more power than what is provided by the car charger... So the car charger limits the discharge, but that's all.
On my old prophet, I could have used GPS for days (using a bluetooth external GPS of course).
It's a pity the diamond is not as power efficient.

mysterd said:
Ok...
The only problem is that my Diamond seems to use more power than what is provided by the car charger... So the car charger limits the discharge, but that's all.
On my old prophet, I could have used GPS for days (using a bluetooth external GPS of course).
It's a pity the diamond is not as power efficient.
Click to expand...
Click to collapse
I agree with you. A fellow XDA member posted somewhere here that he started of with 100% for a 6 Hour journey using his diamond and when he got to his destination he said it was around 30% left!

It's not too hard to build one, as soon as I remember, it's adapter (for the battery), 5V regulator and a female USB (it's easier to find, you use your sync cable and you can charge other things, MP3 players, portable speakers etc.).
Am I right, or you have different design.
Also, you can use 4 1.5V batteries, I've got few 1900mAh of them, so they should last longer. Also, I think the regular 9V battery is bigger than 250mAh.

Well i soon will be updating my E42M website with this years invetions so visit it when you can
See my signature

Turn off USB Charging for Omnia (solved)

Hi all, there is a way to turn off the charging function when using USB ,
1-install FdcSoft TaskMgr from here
dotfred.net/TM/FdcSoft_TaskMgrv3.3_WM6.5.cab
2-go to Devices--->$device\BAT1(BAT1 and stop this service
3-thats All
To Use charge restart this service

hey thx for the tips! but after stop the service my o2 keep saying batt low...

Is there any reason why we would want to turn off this service?

I heard that it keeps your battery in good shape

peepe1302 said:
I heard that it keeps your battery in good shape
Click to expand...
Click to collapse
I'm not so sure about that... I've always charged both my O2 and the O1 before through usb and the battery has always been fine.
Actually, I even noticed that charging through usb takes longer but once it's charged it also lasts longer (this happened on the O1, haven't made the same comparison on the O2 yet)
Dunno if plugging / unplugging the usb cable too frequently can have some sort of ill effect on the battery life, but it's not like we're plugging it every 10 minutes is it?
Never had a battery problem with a "normal" usb usage and usb charging enabled so far...

Yes but not anymore
peepe1302 said:
I heard that it keeps your battery in good shape
Click to expand...
Click to collapse
It's always good to drink all the juice so the battery don't develop a offline or fake "memory".
Also the multi cell assembly insde the battery praticly don't allow batery memory anymore.
Thx for the reference

Regarding battery life
Hi,
Actually, for a battery it depletes it's life every second. There is no way of preventing this But we can extend the service life. For example the most basic rules:
1-Do not charge your battery unless it is almost empty
2-Avoid deep discharging (this is not possible with a PDA coz it has an early shut down routine)
3-Do not overcharge the battery (also this not possible, coz there is a voltage limiter by hardware)
4-Do not leave your battery in a high temperature environment (for example in a car during summer, we are using chemical-reaction batteries)
the rest is do not puncture, do not short circuit boola boola boola
ok, finally while using your PDA with a USB charging interface, it should stop charging when the battery is full (Even my mother's old nokia doing this)
Plus, how much it costs for a new battery? only few bucks.. ehh.. (not for an original one ofcourse)
PDA batteries, in most cases, are 3.7volts (charging voltage is 5volts by USB) and 1200 to 1500mAh (for the ones who doesnt know what is "mAh": it is the capacity of the battery and it means if you pull for example for a 1300mAh battery, 1300 "mili ampers per hour" it will deplete. Some of my friends they are using 3.7V 2000mAh batteries while their PDAs supplied with 1230mAh batteries, thus, standby time goes up to a week. They are not using their originals ofcourse. I dont understand why manufacturers are not supplying PDAs with these kind of batteries by standart. Even a chinese made battery can be so efficient. (I am using a chinese one, my original battery is 1300mAh, i could find 1500mAh same battery)
I spoke to my friends, they are not charging their 2000mAh batteries via USB/charger while battery is in the phone. Because there is an internal electrical resistance of every battery. May be PDA's battery charging circuit get damaged! Because of this if you plan to use a high capacity battery, charge it seperately by using another charging equipment.
Finally when you want to sell out your PDA install the original battery (which you have never used before hehe ) and get a higher price

This might be some really big idiotic question, but what if the service is down and the battery drains and the phone shuts itself off, will it turn on by connecting the charger to the phone?
I ask this because with the service off even the real phone charger wont work (at least while it is on)!

houssam10001 said:
Hi all, there is a way to turn off the charging function when using USB ,
1-install FdcSoft TaskMgr from here
dotfred.net/TM/FdcSoft_TaskMgrv3.3_WM6.5.cab
2-go to Devices--->$device\BAT1(BAT1 and stop this service
3-thats All
To Use charge restart this service
Click to expand...
Click to collapse
I just did what you said, and now the device\BAT1(BAT1 completely disappear! How am i supose to turn it on again now?
And no, i obviously didn't delect it, i just stoped the service and it vanished from the damn list!

im very interested in this but how can you restart the charging service?

[Q] Droid X Battery Hard wire to car.

Hello,
this is a bit of a custom job. I want to take my Droidx and make it a dedicated display in my car. My issues are the battery is shot and buying another is more investment than I prefer. also the battery is not going to work for what i'm doing because it will not be on charge as frequently as it need to get a full charge.
so here is what i want to do. I want to hard wire the battery terminals to a 3.7 vdc source and use that as the primary power to the phone. and use the usb power to wake it on entry and while the ignition is on. right now i've got the usb cord without the battery and it works fine. but I wanted to maybe use the battery/usb to wake it. Anyone able to power the phone on the terminals for the battery?
Thanks
-xpbr2000

xpbr2000 said:
Hello,
this is a bit of a custom job. I want to take my Droidx and make it a dedicated display in my car. My issues are the battery is shot and buying another is more investment than I prefer. also the battery is not going to work for what i'm doing because it will not be on charge as frequently as it need to get a full charge.
so here is what i want to do. I want to hard wire the battery terminals to a 3.7 vdc source and use that as the primary power to the phone. and use the usb power to wake it on entry and while the ignition is on. right now i've got the usb cord without the battery and it works fine. but I wanted to maybe use the battery/usb to wake it. Anyone able to power the phone on the terminals for the battery?
Thanks
-xpbr2000
Click to expand...
Click to collapse
The phone works without a battery. Maybe bypass it and connect to USB?
Sent from my SCH-I605 using xda premium

You'll need to have a battery or something to keep it from just turning off when you turn off the car, won't you? I looked into doing something like that with the RasPi, and I you're not supposed to just remove the power supply.
Or can you wire it to wear it has power when the car isn't running?

sghsmorgan said:
You'll need to have a battery or something to keep it from just turning off when you turn off the car, won't you? I looked into doing something like that with the RasPi, and I you're not supposed to just remove the power supply.
Or can you wire it to wear it has power when the car isn't running?
Click to expand...
Click to collapse
if i could figure out what the battery supplies the phone then i could wire a 3.7v source to the battery terminals on the phone.
I've had this system wired up for a couple months and it works great. the only issue i've had is the age of this battery makes it not take a charge. so in the heat of the day i get in the car and the battery temp is 100+ the phone is dead because the battery doesn't operate. and the charger can't charge the hot battery and keep the phone powered. I never liked the idea of a battery inside the car. heat + battery = boom (maybe not but it could cause a big mess and damage the phone.
the question i need answered is what is required for the phone to run? what do each of the battery terminals do? obviously one is ground (marked) and one is positive (also marked) the middle terminal has to do with a temp or charge signal. it doesn't power on just the positive and negative to the best i can test it. maybe i'm doing it wrong.

and i have looked at a rasPI. we have one. but i can find a capacitive touch screen that is small enough to fit in my dash (4th gen camaro) without deleting my radio which isn't going to happen. plus they are expensive. idk y tablets and such are cheaper with the same type screen plus the hardware of the tablet.

Almost! Cept with a Hero!
OP: If you still have the battery, you should be able to find the Amperage listed in mHa near the voltage on the batteries sticker. After you have these 2 values you should be able to construct a small circuit to drop your cars internal voltage down to the appropriate level. Hook it up to the 12v from your car at Ignition/Accessory if you want it on whenever you can use the radio, or to the Constant 12v, after the fusebox, to have it usable whenever your car doesn't need a jump! Best of Luck!
So, I'm actually trying something similar right now except with a HTC Hero with a bloated battery that refuses to hold a charge. I've tried several times to boot the phone with just the USB cable, but all I get is a red battery icon : / I'm looking to just hardwire this stupid thing to a plug or even a 9v alternative. This is gonna be used around my house for various things
As of my posting this, I've found 3 threads on slightly similar topics, none with very good/any info tho. Thank you in advance for any help!