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04-05-2008, 02:15 AM #1External battery? Help me decide...
So after about half a day of heavy use my iPhone battery starts to give out. This can obviously be very aggravating when I don't have access to a charger. For this reason I've been looking for a good external battery for the iPhone.
My two requirements are that it connects via a cable (I don't want one that hooks directly to my phone because i like my current case) and I also do not want a battery pack that uses AA or AAA batteries.
My biggest concern is compatablilty issues. I would hate to spend $50 on a battery and it not even work with my phone!
Here are a couple of ones I have found already
[ame="http://www.amazon.com/APC-UPB10-Mobile-charging-devices/dp/B000GBN42E/ref=pd_bbs_6?ie=UTF8&s=electronics&qid=1207379421& sr=8-6"]Amazon.com: APC UPB10 Mobile Power Pack for charging mobile devices: Electronics[/ame]
[ame="http://www.amazon.com/iphone-ipod-lithium-External-battery/dp/B000YOXTHI/ref=pd_bbs_sr_8?ie=UTF8&s=miscellaneous&qid=120737 9112&sr=8-8"]Amazon.com: iphone, ipod lithium External battery pack: Everything Else[/ame]
[ame="http://www.amazon.com/MACALLY-External-Battery-all-iPods/dp/B000CGG8LW/ref=pd_bbs_sr_10?ie=UTF8&s=electronics&qid=1207379 421&sr=8-10"]Amazon.com: MACALLY External Battery for all iPods: Electronics[/ame]
I'm leaning towards the first one, but the only issue is that you need to push a button every 20 mins to keep it charging. Could get annoying fast but I wouldn't know until I messed around with it.
So does anyone have any input on the topic? Or perhaps suggestions for other options? Any help is greatly appreciated. Thanks in advance!
04-09-2008, 04:15 PM #2
I dont know if you bought one yet but when i was in IRAQ i bought a BELKIN "Back-up Battery Pack" for my 60GB IPOD Video and it works pretty good on both my IPod and my IPhone. i think the price was abit higher than the ones your lookin at and its also abit thicker. it runs off of 4 AA batteries.
04-09-2008, 05:47 PM #3
I made my own for the cost of 4 AA rechargeable batteries and a battery holder case with switch and two resistors. Used 2200 mA one's and that allows me to recharge the phone almost 1.5 times. Total cost 15 bucks. The resistors you need to trick the iphone into charging.Don't be shy if I helped you use the Thanks button, I do it.
04-09-2008, 08:22 PM #4
I recommend the third battery from Macally, I have it and have used it on my ipod touch and it does an excellent job, I can fully recharge my ipod at the same speed with the charger, plus the battery itself gets charged with an usb charger. It has an on/off switch when its not in use. I can get about 3-4 fully charges on the touch depending on how low the battery is. The only downside is that it takes like 5 hours to fully charge the battery if its empty.
here is some reviews on the battery, that's also the place where I bought it
Last edited by mariotheotaku; 04-09-2008 at 08:25 PM. Reason: URL added
04-10-2008, 05:26 PM #5
04-11-2008, 12:12 AM #6
Last edited by iBlade; 04-11-2008 at 12:15 AM.Don't be shy if I helped you use the Thanks button, I do it.
04-12-2008, 06:42 PM #7
You think you could draw a wiring diagram including those resistors?
04-12-2008, 06:52 PM #8
04-12-2008, 09:45 PM #9
Doesnt have any information on the resistors that allow it to work with an iphone.
04-12-2008, 10:06 PM #10
04-13-2008, 02:33 PM #11
But be carefull guys, don't damage your phone.Don't be shy if I helped you use the Thanks button, I do it.
04-13-2008, 05:10 PM #12
Ok thanks I'll give this a try sometime this week if I can find the time. Couple questions though, could the 6v supplied by the 4 AA batteries potentially damage the iPhone because usb's typically output 5v? Would it be safer to use only 3 AA batteries with a total of 4.5v?
04-13-2008, 06:00 PM #13
Well I would not recommend regular batteries, as they have like you correctly said 1.5 v and that makes 6 v. I use rechargeable, they have 1.2 and 4.8 v is no problem plus when they are fully charged you get about 5-5.2v. You could of course also 5v voltage regulator and then use reg. batteries, but it will be more costly in the end. In the old days AA rechargeable batteries had only 500mA, so alkaline batt lasted longer, but these days you get over 2000mA. Good luck.Don't be shy if I helped you use the Thanks button, I do it.
04-13-2008, 08:06 PM #14
Okay I'll take that into consideration. One more thing though, could you charge the rechargeable batteries in the device if you plugged in a powered usb cable? or is there more involved in the charging process than just that? Sorry I know very little about the topic...
04-14-2008, 04:13 AM #15
No problem, I don't know everything either. I wish I could write apps. Anyway, yes you could charge them but I'll have to find a male to male usb cable since you got female on both sides.Don't be shy if I helped you use the Thanks button, I do it.
04-14-2008, 07:51 PM #16
Well i got everything i would need from radioshack today, but somehow managed to lose the resistors between there and my house... Don't know what happened there... But i could not find any 470 kOhm resistors only 470 Ohm ones. Is that what you meant to say?
04-15-2008, 12:47 AM #17
No no no, please be careful. 470 kOhm means 470 kiloOhm meaning 470.000 Ohm. See here:
The two pins in the middle are ttl serial data pins and can only handle 3.3v but you are charging with 5v so you have to reduce the voltage. 470ohm would not do that for you, you can damage the phone. You can use something close to 470kOhm 420-510kOhm will work. Remember going to low damage, to high phone will not accept charge.Don't be shy if I helped you use the Thanks button, I do it.
04-16-2008, 01:22 AM #18
Okay good thing I lost those resistors then! Well Im not too confident in my electronics and I've been meaning to buy one of those boxwave adapter thingies anyways to work a couple chargers I have. I'll let you know how it works. Thanks for all your help!
04-16-2008, 09:23 AM #19
You're welcome. The boxwave adapter looks alright, at least it is easier.Don't be shy if I helped you use the Thanks button, I do it.
04-20-2008, 12:13 AM #20
Okay got my adapter today. Everything works great. I'd post pictures but it looks pretty identical to yours. Thanks for all your help!