Charging the Kindle

Forums › Gadgets, robotics, home automation, electronics (including wearables) › Charging the Kindle

tallmaninthecnr

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#84654 4-Jun-2011 13:21

I didn't bother buying a wall charger for my Kindle (its in the country now but still have to wait till tuesday

) but was wondering whether my phone charger (Samsung Galaxy) would work as i believe they are the same connection?

freitasm

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#477727 4-Jun-2011 13:27

Yes, it should work just fine (assuming it's the same micro USB plug). I use a single charger for my LG Optimus 7, Motorola Defy and Kindle.

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tardtasticx

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#477734 4-Jun-2011 14:13

It should work fine. I've charged mums kindle from my Samsung Galaxy 3 charger, and charged that phone with her kindle charger too. Both work.

Ragnor

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#478127 5-Jun-2011 23:13

Generally most smartphone chargers are 5V and 500ma to 1a output which should be fine.

Always check the output of the charger ie: don't use a charger with 9v output or higher than 1a

kiwitrc

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#478142 6-Jun-2011 06:24

Speaking of Kindle there is a very poor Consumer report up on their site about e readers that seems to have attracted a few comments.

trig42

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#478148 6-Jun-2011 08:12

I love my kindle.

Charges fine from any microUSB charger (I am using the one from my borrowed Voda845). Not that it need charging all that often. I have a KindleDX, and I just turn off the 3G, and I get a couple of weeks out of it between charges (I would use it for 60-90 minutes a day).

TechSol

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#478503 7-Jun-2011 12:40

Ragnor: Generally most smartphone chargers are 5V and 500ma to 1a output which should be fine.

Always check the output of the charger ie: don't use a charger with 9v output or higher than 1a

Just to clarify here, I agree about using the correct voltage, however a charger with a higher possible amperage is fine, as the device will only draw what it is capable of drawing (amps are drawn rather than delivered)

As such if you have a charger with a mA rating which is too low for the device, you may cook the charger. However if you have a charger with a mA rating that is higher than the device will draw, then that is no problem.

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jaymz

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#478555 7-Jun-2011 14:49

Evilg:
Ragnor: Generally most smartphone chargers are 5V and 500ma to 1a output which should be fine.

Always check the output of the charger ie: don't use a charger with 9v output or higher than 1a

Just to clarify here, I agree about using the correct voltage, however a charger with a higher possible amperage is fine, as the device will only draw what it is capable of drawing (amps are drawn rather than delivered)

As such if you have a charger with a mA rating which is too low for the device, you may cook the charger. However if you have a charger with a mA rating that is higher than the device will draw, then that is no problem.

+1

The only thing you need to make sure is the same is the output voltage and polarity (USB isnt a problem, but for other power supplies it is).

Ragnor

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#478776 7-Jun-2011 22:21

The Kindle has a 3.7 volt, 1750 mah Lithium Polymer battery battery, these shouldn't be charged at more than 1C (C being capacity of the battery), for for a 1750 mah battery, would be ~1.7A (amps).

Whether the Kindle charging circuits are smart enough to make sure it doesn't draw too much on from "dumb" charger with a high amp rating I don't know, better safe than sorry imo.