I've been lookin at solar charges for a while, but reluctant on buying one for my tilt. I don't know the performance and if the tilt would be too strong for a solar charger. I'm not very good when it comes to batteries so if someone could clear up exactly what volts and mAh and the 1300, 1900, 2200 numbers mean I would be extremely grateful. Is there a solar charger out there that can charge the tilt? If so, and if compatible, is the Solio charger a viable solar panel charger for it? Thanks a bunch in advance!
Regards,
-K-
Volts are potential, or how much electricity wants to get somewhere. For instance, 3.7v isn't very much, so it won't try to get to ground very hard. On the other hand 10,000v is a lot, so the electricity might try and jump through the air to get to ground.
mAh is a measure of battery capacity. "A" stands for Ampres, or Amps. An amp is a measure of how much electricity is flowing through a wire. A milli-amp or mA is 1/1000 of an amp. A mili-amp hour is the amount of electricity it takes to keep 1 mA flowing through a wire for one hour. So the Kaiser battery, which is 1350 mAh, could keep 1mA flowing through a wire for 1350 hours, or 1350 mA flowing through a wire for 1 hour. Since the kaiser battery life is something around 10 hours, the power usage is more like 135mA for 10 hours.
In practical terms, the more mAh your battery is rated for, the longer it will last. The Kaiser stock battery is 1350 mAh. Also available are 1500, 1600, 2400, 2800, 3000, etc mAh batteries. The 2800mAh battery should in theory provide twice the battery life. However, the battery is very large and sticks out of the back of your phone, making it bigger in your pocket. There are plenty of solar chargers that can charge the tilt. The easiest way to do it would be to find a 12v solar pannel with a car power jack. Then get a car power adapter for your Tilt, and plug into the pannel. Depending on the size of the pannel, the amount of light, and the position of the pannel, charging might be slower or faster. With a large pannel, it is probable that the Tilt will charge just as fast as when plugged into an outlet. Look for a pannel with at least a 5 watt power rating.
I posted about brando's solar USB chargers in another thread about usb power packs.
http://forum.xda-developers.com/showpost.php?p=1914988&postcount=63
Well, I'll need to ask this question: do any of you guys know if Acer is going to bless us with a USB to proprietary connector for our Iconias?
Look, I've accepted the length of the power cord. One, it is what it is and two I can always go and buy an after market adapter which could be longer. Fine. What is unforgivable, to me, is that I need an AC plug and I can't use the myriad (at least three) AC to USB plugs that I have to charge my unit. Heck, I can even use my wife's iPad adapter to charge my EVO in a pinch.
It can be done as I assume that the docking station Acer sells can charge the unit. Besides if Sammy, Toshiba and Asus have similar things why can't Acer? If they come up with something like this they'll (to me) boost the value of my Iconia a bit: I can use USB and the other adapter to charge it.
C'mon Acer: get in gear!
I'm not 100% sure I understand the question, but I'll take a stab anyway.
It is impossible to charge through USB to the A500, either through the USB ports or the dock connector. USB only has a 5v signal on it, and I believe it's max current capacity is 500ma (per standard), whereas the A500 needs 12v and 1.5a of current.
Does that help?
USB 2.0 standard allows maximum output of 1.5 amperes, or 1.8 amps on a dedicated charge port with a special cable (e.g. cannot carry data but can only charge, I have never seen one by the way) at 5 volts. These 1.5 and 1.8 amps are for USB chargers by the way, computer USB 2 ports are all rated to a max. of 0.5 amps.
A500 needs 1.5 amps at 12 volts, which is roughly 2 times more current than the usb standard (Watts = Voltage x Amps), e.g. acer power brick supplies 18 watts vs a dedicated USB charger can only supply 9 watts at 1.5 amps. Most of the phone chargers that use USB cables are around 1 amp, making their max. output 5 watts vs 18 that acer needs.
In summary, it is not possible to charge A500 via USB.
No, no, no....
I think I explained myself poorly.
You guys know that the on the bottom of the Iconia there's a connector; a proprietary connector. I assume that the unit can be recharged through there. So what I was saying is that there should be a cable that ends in that proprietary connector on one side, and on the other on a standard USB connector so that it can be charged. Very much like the iPad or the Samsung Galaxy.
I should have mentioned the word 'proprietary'
citizenklaw said:
I think I explained myself poorly.
You guys know that the on the bottom of the Iconia there's a connector; a proprietary connector. I assume that the unit can be recharged through there. So what I was saying is that there should be a cable that ends in that proprietary connector on one side, and on the other on a standard USB connector so that it can be charged. Very much like the iPad or the Samsung Galaxy.
I should have mentioned the word 'proprietary'
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If I had read your original post carefully I would have noticed that
That would work if they made a 5 volt, 4 amp charger with removable usb cable on the charger end as you suggested, and we would be able to use that charger for everything else as well.
Well...
I'm keeping my fingers crossed.
Not to rain on your wishing parade, but it wouldn't work, even with the dock connector adapter. The batteries in these tablets are 7.3 volt Li-Po packs(I think thats the voltage at least) so they require at least 9 volts to charge them. Thats why the docks that Acer makes for these use the same power supply as the tablets themselves. Without high enough voltage, it wouldn't charge. I guess you could make a charger that would plug into the connector on the bottom, but you would end up having to use the same old power supply to get it to do anything. Conceivably you could make a double USB plug on the other end wired in series, that would bump it to 10 volts/500 ma and it would work as a trickle charger of sorts.
I need a longer cord around 10' and every cord I've found will not charge at more that 400mA when hooked up to a 2.1A charger. I'll plug a 3' cord and get 1900mA charge out of it. Does anyone know of any cord that will work and provide a decent charge at the 10' length?
mtnbiker717 said:
I need a longer cord around 10' and every cord I've found will not charge at more that 400mA when hooked up to a 2.1A charger. I'll plug a 3' cord and get 1900mA charge out of it. Does anyone know of any cord that will work and provide a decent charge at the 10' length?
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The voltage drop for really small AWG conductors is consistent with your findings.
Usb 2.0 cables can use 28-AWG for data and power transmission @400mA at 5 volts at a distance of 10 feet with a 5.3% drop in voltage.
That is to say the voltage drop is too large over the distance you want with the standard 28AWG USB cable for the charging current you want.
You need a speciality cable.
I know they make 20AWG (power) and 24 AWG (data) USB extenstion cables at 10 feet.
For these cables the voltage drop is typically no more than 3.97%
So 5 volts would give roughly 4.8 volts at 1.9A at 10 feet using thr 20AWG power conductors.
If the charger or phone can sense the voltage drop it will auto regulate and pull only the amperage that will keep the charger voltage near 5 volts... and not burn things.
Thus a 28 AWG cable will cause the devices to use a much lower amperage... for the reasons discribed.
Sent from my GT-I9500
Gillion said:
The voltage drop for really small AWG conductors is consistent with your findings.
Usb 2.0 cables can use 28-AWG for data and power transmission @400mA at 5 volts at a distance of 10 feet with a 5.3% drop in voltage.
That is to say the voltage drop is too large over the distance you want with the standard 28AWG USB cable for the charging current you want.
You need a speciality cable.
I know they make 20AWG (power) and 24 AWG (data) USB extenstion cables at 10 feet.
For these cables the voltage drop is typically no more than 3.97%
So 5 volts would give roughly 4.8 volts at 1.9A at 10 feet using thr 20AWG power conductors.
If the charger or phone can sense the voltage drop it will auto regulate and pull only the amperage that will keep the charger voltage near 5 volts... and not burn things.
Thus a 28 AWG cable will cause the devices to use a much lower amperage... for the reasons discribed.
Sent from my GT-I9500
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Thanks for the in depth explanation!!!!! I'll have to dig around with the thicker cables!
Or melt or just waste my time? Looking to hack together an inductive charger out of spare parts, my dell streak 7 needs is a high output charging, 2 amps is stock So the standard 500ma inductive chargers are useless, these powercubes claim 860ma output so running 2 in parallel should get me to a useful amperage, anyone see any gotcha's in stringing this stuff together?
Dual Output Port USB Charger HUB
http://www.ebay.com/itm/181129327287?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1438.l2649
OTG USB cable
http://www.ebay.com/itm/200921187146?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649
Powercube Universal Wireless Charger
http://www.ebay.com/itm/Powermat-PM...S_Cell_Phone_PDA_Chargers&hash=item53f7fd0860
Reading from the AC adapter, this thing can charge at 1.8 amps. I'm doing some research on car chargers that can output 2 amps to the phone via a USB cable, but the trick is getting the phone to pull more than .5 amps from a car accessory outlet. So far I haven't had much luck. There seems to be a lot of info on ipad stuff, but not much in the way of high powered Android devices. So I thought I'd start a thread about compatible car chargers that will allow a full 1.8 amp pull from my car outlet, and see what you guys and gals think and have tried. I've attached a pic of my current setup. It's a Proclip holder on a 2012 Mustang. I've used this same setup for several previous phones (S2 Skyrocket and S3). The holder itself is adjustable to accommodate various phones with cases.
earlthepearl said:
Reading from the AC adapter, this thing can charge at 1.8 amps. I'm doing some research on car chargers that can output 2 amps to the phone via a USB cable, but the trick is getting the phone to pull more than .5 amps from a car accessory outlet. So far I haven't had much luck. There seems to be a lot of info on ipad stuff, but not much in the way of high powered Android devices. So I thought I'd start a thread about compatible car chargers that will allow a full 1.8 amp pull from my car outlet, and see what you guys and gals think and have tried. I've attached a pic of my current setup. It's a Proclip holder on a 2012 Mustang. I've used this same setup for several previous phones (S2 Skyrocket and S3). The holder itself is adjustable to accommodate various phones with cases.
Click to expand...
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Data pins need shorted together, either in the USB cig plug, or some micro USB cables are this way...
Additionally, the USB cable you use needs to have thick enough power wires to support 1.8A charge draw. Many USB cables use 28 AWG wire for the data conductors, and then you get varying degrees of wire gauge for the power conductors depending on manufacturer. Some people use 28 AWG for both, some use 26, and good cables are made with 24 AWG wire. The thicker wire gauge means less resistance so less power is lost and more can be put into the battery. To pull a proper 1.8A the phone probably should have 22AWG power wire in the USB cable really...
earlthepearl said:
Reading from the AC adapter, this thing can charge at 1.8 amps. I'm doing some research on car chargers that can output 2 amps to the phone via a USB cable, but the trick is getting the phone to pull more than .5 amps from a car accessory outlet. So far I haven't had much luck. There seems to be a lot of info on ipad stuff, but not much in the way of high powered Android devices. So I thought I'd start a thread about compatible car chargers that will allow a full 1.8 amp pull from my car outlet, and see what you guys and gals think and have tried. I've attached a pic of my current setup. It's a Proclip holder on a 2012 Mustang. I've used this same setup for several previous phones (S2 Skyrocket and S3). The holder itself is adjustable to accommodate various phones with cases.
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Hi, not trying to hijack your thread, but can you tell me which case you are using? I like the fact that it has a large lip around the screen.
Thanks
What model pro clip holder is that? I need to replace the one from my nexus. May hold out for the G2 specific one with the cable built in (like the nexus one I have now), but no telling how long that will be.
mikea3000 said:
Hi, not trying to hijack your thread, but can you tell me which case you are using? I like the fact that it has a large lip around the screen.
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It's the Body Glove case from the AT&T store. It was the only one they had at the time, and I didn't feel like waiting to order one so I overpaid in exchange for some piece of mind.
stetsonaw said:
What model pro clip holder is that? I need to replace the one from my nexus. May hold out for the G2 specific one with the cable built in (like the nexus one I have now), but no telling how long that will be.
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It's the holder I ordered for my Skyrocket a few years ago. It's a generic adjustable one that fits a lot of different phones with cases. It has fit my SR, GS3, and now my G2, all with cases.
EniGmA1987 said:
Additionally, the USB cable you use needs to have thick enough power wires to support 1.8A charge draw.
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I have a custom 5 inch up angle micro USB cable I ordered from www.usbfirewire.com. It is a very thick wire, thicker than the charging cable the G2 came with. The one in my pic is probably not thick enough for a 2 amp charge.
Here is an interesting article I came across about car chargers:
The Best USB Car Charger
EniGmA1987 said:
Additionally, the USB cable you use needs to have thick enough power wires to support 1.8A charge draw. Many USB cables use 28 AWG wire for the data conductors, and then you get varying degrees of wire gauge for the power conductors depending on manufacturer. Some people use 28 AWG for both, some use 26, and good cables are made with 24 AWG wire. The thicker wire gauge means less resistance so less power is lost and more can be put into the battery. To pull a proper 1.8A the phone probably should have 22AWG power wire in the USB cable really...
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Spot on. FWIW, the LG OEM cable is 20AWG on the power wires. This is the only viable explanation as I can't get the OEM wall charger to work with any cables I have sitting around (24AWG at best).
So would we be better off just using the factory charger with a power inverter or is there an actual car charger that will work?
Provided you short the data pins in whatever car charger you buy (if they arent already) and you get a cable with beefy power conductors then you should be able to draw 1.5-1.8A of power through a car charger. You have to make sure the car charger will do what you want though, many 2A chargers also have 2 ports to plug into. What they don't tell you is that each port is limited to 1A and both together will give 2A draw, but not to charge one device. The car itself also may limit power to the charger as well, I know my car specifically says 1.4A max through the cigarette plug. So it is possible to do, it is all just dependent on so many other things that you have to check off the list.
in_dmand said:
So would we be better off just using the factory charger with a power inverter or is there an actual car charger that will work?
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That's what I'm trying to figure out. I'm tempted to try that Scosche charger, with my thick USB cable. I installed Currentwidget, so I should be ale to see at what rate I'm charging at if I decide to order it.
in_dmand said:
So would we be better off just using the factory charger with a power inverter or is there an actual car charger that will work?
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I like the Powergen dual 2.1A USB charger I got off of Amazon. Has served me well. But really, anything 1.8A+ that's quality will do. The trick is going to be the USB cable. Still trying to source one from a reputable site, but you want something with 20AWG for the power. If I find something, I'll post it. Thus far I found two sites, kinda obscure, but not thrilled that the shipping alone costs more than the cables which run $6.
---------- Post added at 08:41 PM ---------- Previous post was at 08:39 PM ----------
EniGmA1987 said:
Provided you short the data pins in whatever car charger you buy (if they arent already) and you get a cable with beefy power conductors then you should be able to draw 1.5-1.8A of power through a car charger. You have to make sure the car charger will do what you want though, many 2A chargers also have 2 ports to plug into. What they don't tell you is that each port is limited to 1A and both together will give 2A draw, but not to charge one device. The car itself also may limit power to the charger as well, I know my car specifically says 1.4A max through the cigarette plug. So it is possible to do, it is all just dependent on so many other things that you have to check off the list.
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I suspect the phone can detect the charger capacity because my OEM LG cable works on both the Apple and Non-Apple ports on the Powergen charger. Since that's the case, the phone doesn't seem to care if the data pins are shorted or not. And the Powergen is advertised as 4.2A total, so 2.1A per port.
kyler13 said:
I like the Powergen dual 2.1A USB charger I got off of Amazon. Has served me well. But really, anything 1.8A+ that's quality will do. The trick is going to be the USB cable. Still trying to source one from a reputable site, but you want something with 20AWG for the power. If I find something, I'll post it. Thus far I found two sites, kinda obscure, but not thrilled that the shipping alone costs more than the cables which run $6.
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Something worth considering is looking at charging cables labeled for tablets. They usually charge in this amperage range. I plugged my g2 into my kindle fire HD charger (1.8A) and didn't get any slow charge warnings.
Geekybiker said:
Something worth considering is looking at charging cables labeled for tablets. They usually charge in this amperage range. I plugged my g2 into my kindle fire HD charger (1.8A) and didn't get any slow charge warnings.
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Doesn't that come with the same Amazon branded usb cable you can get by itself? Take a look on the cable. A lot of times they label the wire gauge.
Sent from my VS980 4G using Tapatalk 4
my amazon branded micro usb cables are 28awg and they still allow quick charge with oem wall charger.
The charging issues associated with this phone has been a huge PITA. I've been carrying my stock cable around just so I can charge my phone!!! Subscribed so I can maybe help out with some info...
bova80 said:
my amazon branded micro usb cables are 28awg and they still allow quick charge with oem wall charger.
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Are you certain that's not just the data side that is 28awg? Very surprised you can pull 1.8A at 28awg.
Sent from my VS980 4G using Tapatalk 4
kyler13 said:
Doesn't that come with the same Amazon branded usb cable you can get by itself? Take a look on the cable. A lot of times they label the wire gauge.
Sent from my VS980 4G using Tapatalk 4
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They are unmarked.