Solar Phone Chargers - HD2 General

Since running Android on my Leo, I have noticed that my original Leo battery gets depleted twice as fast. So I've been looking into portable battery chargers, and I also stumbled upon solar phone chargers (battery also included).
Is it worth investing (although it isn't very expensive to try anyway)?
Wondering if any of you have any experience with a solar charger? If so, what battery capacity did you get (1000-2000 mAh, 2000-3000 mAh, etc)?

haven't tried it personally, but here's a link if you want to make one for the HD2 yourself:
http://forum.xda-developers.com/showthread.php?t=1028409
it's still not complete though.
I've kept it in my bookmarks just in case I decided to make one for myself one day

I had a cheap solar charger without battery. It didn't recharge the HD2. It was full bright sunlight inside the car.
It was enough power to trigger the phone to boot up, but it couldn't charge the phone battery. I get the feeling it probably drained the phone battery..
I bought an extended battery for the HD2. That lets me use the phone with GPS running continuously for about 12hrs.

Related

Awesome little battery Charger for Wing, Dash

Just thought I'd pass this along. This little battery charger for the Wing or Dash charges your phones battery with just one AA battery. It kicks up the voltage from 1.2-1.5v to 5.7v. Saps the hell out of the AA battery but charges the phone -- its really cool. I bought two of them.
I'm Not the seller - I have No interest in selling these. Just thought Wing users would like to know there's such a thing out there.
http://cgi.ebay.com/EMERGENCY-AA-BA...ryZ48492QQssPageNameZWDVWQQrdZ1QQcmdZViewItem
How long of battery power do you get for 1 AA battery?
If it has small USB connector, can I use it for TyTn II (Kaiser)?
I will time it
Hi -- I've not timed it yet but I will and post results.
Iffy
I got one of those little portable chargers for mobile devices. It's a neat concept. Upon pruchasing one of those (in the US) for $19.99, it came with a cheap AA battery, and several adapters for different mobile phones. I used the AA battery that came with it and it charged my HTC Herald P4350 for 20 minutes. You can actually drain (and cause damage too) your phone battery it you have it plugged in (with a dead AA battery) your device (it said so on the package). This is my experience and others may be different. In a nutshell, the amount of time it charges depends on what kind of AA battery you use. Again, this is my experience.
True
Yes it does depend on the type of AA battery you use. A Lithium AA will give you much more than a rechargable NMHI. I put in an alkaline AA and talked with my brother for two hours today using my Bluetooth headset and this thing kept my phone to 100% charge the whole time.
I am not planning on keeping it plugged in all the time especially when its dead.
I am going to use NIMH AA batteries in my Solar Charger that sits on my Dashboard. Rotate them out and get basically free energy. Hey I know its not going stop the Icebergs from melting but its something.
Here are the specs from the package:
Input 1.2-1.5v
Output 5.7v
Standby 80 hours
Talk Time 2 hours
Charge current 850-2300m
Discharge 150-530m
*This one says nothing about draining your phone's battery in fact it says if using NiCads or NMHI to make sure it drains all the way down before you disconnect it. It says best results can be obtained using a Lithium AA but who can afford that.
It Should work with the Kaiser
gogol said:
How long of battery power do you get for 1 AA battery?
If it has small USB connector, can I use it for TyTn II (Kaiser)?
Click to expand...
Click to collapse
Yes it has a mini USB connector and it should work with the Kaiser but you may want to ask the seller to be sure.

Anyone use these battery chargers?

Anyone ever use one of these?
http://cgi.ebay.com/NEW-EMERGENCY-A...ryZ48492QQssPageNameZWDVWQQrdZ1QQcmdZViewItem
Please comment on:
1) how fast they charge
2) how much they charge the phone
thanks!
The kaiser battery is rated for 3.7 volts and the battery that device uses is 1.5 volts. It would charge at the same rate, but drain the AA very quickly. The cost of the batteries it would take to power that thing would quickly outweigh the benefits it would produce. If it had 2 AA wired to it then it might be remotely useful. I mean if you absolutely cant survive if your phone dies, then yes it would give you enough battery life to keep your phone going for a few hours.
Yeah...well I bought two cheapo spare 1600mah batteries of ebay with the thought of carrying one around with me to swap out if needed....but I was considering getting one of the 2-piece rubberized cases for my phone. In that case, the battery compartment I believe will be inaccessible and I don't want to snap off the back case constanstly and wear down the integrity. Therefore I thought something like this might be a good option.
Even with free access to the battery door, I would think opening it up on a regular basis to swap batteries isn't good for it (would get loose, etc...).
Motorola P790
Well, I used Motorola P790 and it is pretty good, rechargeable. I can recharge it together with my phone with one charger. It gives abt 30% recovery of your battery in abt 2 hr.
rovanesyan said:
The kaiser battery is rated for 3.7 volts and the battery that device uses is 1.5 volts. It would charge at the same rate, but drain the AA very quickly. The cost of the batteries it would take to power that thing would quickly outweigh the benefits it would produce. If it had 2 AA wired to it then it might be remotely useful. I mean if you absolutely cant survive if your phone dies, then yes it would give you enough battery life to keep your phone going for a few hours.
Click to expand...
Click to collapse
Not really, these units have a small switching power supply which boosts the voltage to be able to charge the phone (if you look at the picture you can see the copper inductor coil for the oscillator circuit inside the top clear piece), a Kaiser won't charge with an input voltage under 5 volts.
I don't know how long it takes to charge, but I doubt that you can get more than 1 good charge from a fresh battery.
I've had all sorts of charging problems recently. With the Wifi, GPS & Phone on it would use about 500ma of power. But if I was running SatNav it would actually use about 850ma.
What I've done is twofold. I've bought a 2700ma internal battery for the phone and I've got a 12-24v charger that puts out 2a (2000ma) and so far it has kept the device fully charged, even with Bluetooth running!
I'm not sure how to gauge the 2700ma battery as I've only been running it a day. I think it needs a bit more of testing before I use it full time without the spare, but it's also good to have the spare....

[Q] Where to buy an extra battery or charger?

Me and my wife both have EVO's and for some reason hers doesn't hold a charge very good. Is there somewhere you recommend to buy another battery? Id like to have a charger that hooks into my cigarette lighter that'll charge a battery itself.
Check Amazon under EVO Battery.
EVO battery life sucks. You have a choice - slim sexy phone with lousy battery life or big fat phone with good battery life. Your wife's phone may drain faster simply because she uses her phone differently yours. Things like Facebook are known to drain battery very quickly, etc.
Either buy extra batteries or an external battery recharger - anyway, Amazon has them all.
On the battery charger for the car, make sure you get one rated at at least 800 ma. Many car chargers only charge at 500 ma and if you are running navigation or stream audio in the car, your battery will drain faster than it is charging so it will eventually go dead even though it is plugged in. The EVO NEVER runs directly off plugged in power. It always runs off the battery - so even when it is plugged in, it is running off the battery so you have to charge faster than you use.
Battery is fine if you tinker a little bit. But I got 2 batteries +wall charger + free shipping = 10.00 $ from ebay
I'm on Facebook twitter all day with my phone +email txt, talk and I get a full day from each charge
from my phone duh
I disagree with the comment above (mitchellvii), the Evo with the extended battery isn't that fat. Due to a large screen it evens it out. You can still use (with the extended battery) a spring holster and it will fit in a craddle and you can use the kick stand. I also like that more sturdy feeling which gives it a better weight, in my opinion, while holding it.
Amazon is a good place but so is Ebay. You have more batteries to pick from at ebay. I have bought 2 3500mAh batteries from ebay and the battery life is GREAT. Can go almost 2 days without charging with normal use (constantly on facebook, internet, and yelp- normal daily use of talk and text). Price ranges from $9-$85. Most batteries are shipped from Hong Kong so can take up to 3 weeks to ship to the U.S. And buy, if you can, using paypal for a little insurance in case the battery is defect.
You have options: If you want to stay with a slim phone- ebay has some batteries with higher charge capacity than the OEM without needing to buy a backcover- keeping it slim (1800mAh-2000mAh).
You may also look into software as well. Keeping your wifi or bluetooth on will drain your battery faster. Here are some great tips from goodandevo... http://www.goodandevo.net/2010/05/20-tips-to-improve-htc-evo-4g-battery-life.html
Hope it helped.
Try www.spider-foot.com. I got a couple for the Epic and they are great. I'm waiting for the EVO batteries to come which I ordered on 18 Nov. Also free shipping.
Ebay is the way to go. I have 8 batteries, including two 3000mah and two 1800mah along with two wall chargers and I paid less than $60 for all of them combined.

Is someone else also facing inaccurate battery reading with battery SNN5893A

I am facing a strange problem with my device battery indicator it drains the battery very quickly from 100 to 1% in about 2 1/2 hours and after which it gives a battery life more than the time it took to discharge from 100%.I have tried almost all the methods given on various thread but nothing worked.And today on a droid froum i saw a thread in which they have mentioned that the atrix batter with serial number SNN5893A gave them the similar issues like mine when they used this battery with droid.
Is it possible that i am having these issue bocz of this serial number battery as my device battery number is also SNN5893A.
Link of Droid forum thread
http://www.droidxforums.com/forum/droid-x-general-discussion/34327-bh6x-oem-extended-battery-owners-please-read.html
I have three of those batteries that you have. One bought from the UK and ordered two of them from the US. These batteries, being fake or not, gives the same battery charge as the original. I blame Motorola for this because it is impossible to purchase the original batteries from any where.
The exterior of these batteries would wear off much quicker than the original. The low level battery, when is not, has trade off in apps that would not work if the battery level below certain levels i.e. CoPilot app. Charging the battery with the Atrix handset can workout a headache too.
I have eventually bought two desktop chargers to solve the problem. The charger is able fully charge both types of batteries, the good and the bad. See the link below where I purchased the second from for about £14 from Hong Kong. In UK it costs almost the double. Reliable trader since I got mine alteady. With each desktop charger I can charge two batteries at same time. The desktop charger works as a stand, plugged to MicroUsb, too. This is how the second battery is charged. This either can be plugged to the mains (wall outlet) or to the computer. To charge the spare battery it must be plugged to the mains (wall outlet) only.
Now, you can save yourself, from my experience, and buy the Anker alternative from ebay which is the cheapest source. I have read the batteries perform better than those you and I have even though they are at 1800mAH.
A word of warning; I used the power plug shipped with Atrix to charge the battery from the desktop charger. That might have damaged the plug because I no longer can charge neither Atrix nor my Defy with it. The usb cable came with the handset works when I plug it to my laptop.
Desktop charger link:
http://wind-electronic-hk.ecrater.com/p/12162565/motorola-mb860-atrix-4g-usb
Anker Solution (just for reference)
www.amazon.com/Anker-1800mAh-Batteries-Motorola-Multi-purpose/dp/B005FUKVR2
Good Luck

Battery Question

Bought a spare battery for Desire HD, mainly to have with me when at football as one battery through the day is simply not enough
Question is, if i charge a battery up, how long will that battery keep its charge whilst not in the phone. Has anyone got any examples of timings and performance. Both batteries are official 1200mAh batteries.
http://batteryuniversity.com/learn/article/how_to_store_batteries
But since all that's not viable in real life or worth it, I store my battery at 100%. Quite a few times I've used my spare battery a week or so after charging it, and it showed 98-99% when I put it in the phone. Of course that's the phone's reported battery percentage which can be erratic and fluctuate a lot, but when I checked the battery voltage it hadn't decreased by much.
I have 2 spare batteries, both older than my active battery and one slightly bloated and not the best to use (the one I got with the phone). Both are OEM 1230 mAh. I last charged them a week back and didn't use them after. These are the voltages measured with a multimeter as of now -
1st spare battery (1 year 10 months old) - 4.18V
2nd spare battery (1 year 2 months old) - 4.2V
As you can see, that's hardly any decrease in the first one and almost nothing in the second one, considering a full charge is 4.2V (4.204V to be exact). I carry them around with me when I'm outside, so they're exposed to some amount of body heat and ambient heat when the weather is hot. Like I said before, I last charged them one after the other a week ago or a little more than that, and they haven't been used since. So you shouldn't see any significant voltage drop unless you don't use the spare battery for a month or more.
Just in case you weren't aware of this, you can check your battery voltage from your phone easily by keying in *#*#4636#*#* in the dialer and choosing 'battery information'.
Battery Issue
antcox HD said:
Bought a spare battery for Desire HD, mainly to have with me when at football as one battery through the day is simply not enough
Question is, if i charge a battery up, how long will that battery keep its charge whilst not in the phone. Has anyone got any examples of timings and performance. Both batteries are official 1200mAh batteries.
Click to expand...
Click to collapse
The battery will retain its charge and best way is to flash a custom ROM like TrickDroid(Sense 4.0). I have it and battery is amazing even with heavy usage.

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