Kindle - AC charger

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freitasm

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#401271 6-Nov-2010 23:52

Elpie: Does anyone know if standard USB to AC power adapters work safely with the Kindle?

Mine is working fine with the USB wall charger I use for my phones.

ChrnoXIII

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#411831 1-Dec-2010 22:48

i read thru quite a few threads on various forums and the general consensus is taht yea it is okay to use AC wall chargers (non official) so long as the charger can deliver MORE than what the kindle draws.

also when you consider the max draw of computer USB is about 500mA, and that usb chargers like apple's ipod charger can supply up to 2A, you shud be safe :)

haha... im still too scared... i jsut use USB connection on my computer > <

Nitram

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#486332 27-Jun-2011 10:36

I have had ongoing issues trying to use an Apple AC charger with my Kindle - firstly, the usual "Kindle charging" page does not appear on the Kindle, which in itself suggests that something is not quite right, secondly the charging light often does not light up, and thirdly, even when the light is on and it is apparently charging, I'll often find after a few hours the battery is not charged much at all. The Kindle has then been frozen, and I have had to follow the reset procedure.

I have read somewhere (perhaps on this blog) that the Apple charger's output is 1 AMP (not to be confused with voltage), whereas the Kindle requires 0.85 AMPs. I have forgotten a lot of my high school physics, but amps are a measure of current, and my gut feel is that if something is made for 0.85amps and you are putting more than that into it, it may not be good for it.

ahmad

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#486338 27-Jun-2011 10:50

I use the 10W apple iPad charger for my iPhone which only draws 5W.

This is officially supported by Apple. When I asked people that know more than me, they said the iPhone only draws as much as it needs (5W) up to the maximum available 10W.

bazzer

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#486350 27-Jun-2011 11:08

Nitram: I have read somewhere (perhaps on this blog) that the Apple charger's output is 1 AMP (not to be confused with voltage), whereas the Kindle requires 0.85 AMPs. I have forgotten a lot of my high school physics, but amps are a measure of current, and my gut feel is that if something is made for 0.85amps and you are putting more than that into it, it may not be good for it.

That's not how it works. The charger doesn't "push" current into the Kindle, rather the Kindle "pulls" current from the charger. The danger would be if the device needed more current than the charger could deliver. In this case, this couldn't be a problem either because it's designed to charge from standard USB which only delivers 500mA anyway.

onetapu

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#486432 27-Jun-2011 14:25

I have now bought 3 kindles through the Geekzone site - one for myself and two others for envious friends. I know nothing about amps, volts etc etc and in my ignorance have recharged my kindle using my MP3 player plug, with the USB to wall connector thingee. So far so good cos it's still working and charging. Didn't know I might be wrecking the battery though.

Briannz

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#492111 11-Jul-2011 15:59

Anybody using an iPod shuffle AC Charger output 5V 750mA?

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networkn

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#492117 11-Jul-2011 16:28

If anyone else is going to order a lighted cover, I'd be keen to share courier costs.

onetapu

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#492482 12-Jul-2011 14:58

I am using a Belkin power adapter to recharge my kindle, with specs: AC 100-240 V, 50-60 HZ, 0.5 amp, output rated DC 5V-1A, whatever that all means. Same adapter I use to recharge my (old) ipod. Sent the specs to Amazon to check it was OK to use, and received a reply that didn't mean a thing to me - just a generic response about buying an adapter from them to suit my country ......

Anyone know if this is OK to use on my kindle?

networkn

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#492483 12-Jul-2011 15:00

Never mind I bought one from ebay last night for $50 USD

Briannz

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#492517 12-Jul-2011 15:34

I have an iPod and received a similar message until I sent a rather ascerbic reply asking for information not marketing waffle and I got a positive reply. I pointed out to them that they needed to empathise with international customers and realise that the freight cost is more than the adaper is worth. After the first answer I checked with my son who is an Electrical Engineer and he said providing the wall adapter was 5V and was a USB female plug I could safely use it. He went on to explain that the USB interface has a set standard for amps flow and this applies to all USB ports that is why you can use any providing it is USB.

Hope this helps

onetapu

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#492563 12-Jul-2011 16:42

Thanks so much for an answer finally! I had been using my adapter, in my ignorance, and it seems to be OK so far.

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