kindle 3 (keyboard) not charging

baszek · 03-02-2014, 01:31 PM

Hello
I have just bought broken kindle 3 keyboard for a 25$ with shipment. I will have it in home at tuesday. The previous owner said that it's not charging the battery - he even bought new battery and he used it until he completely drained the battery - kindle was not charging new battery either.
Could you help me find defect in it ? Any ideas ?

First thing I will check with multimeter will be micro usb in kindle - often they are broken or loose.
I bought kindle with old battery which is probably completely drained so could I charge it in external charger without I2C - just using + and - ?

Do you know if its possible to turn on amazone kindle 3 and use it with a battery without that I2C pins just - and +? - I have plenty of batteries with similar capicity (or I can connect two identical batteries-parallel connection) from mobile phones which have 3 pins plus, minus and some other for measuring temperature. If I manage to repair charging (I hope it will be broken micro usb) then is it possible to charge such a battery from mobile phone (2 pins-without I2C) with kindle?

Ian.M · 03-03-2014, 06:44 AM

Not to be encouraged. If you *really* want to mess around with charging LiPO batteries outside of the device they are meant to be in, you need a dedicated intelligent LiPO charger that can be configured for the number of cells and cell capacity. An incorrectly charged LiPO is basically an incendiary device. If the battery is excessively discharged or has bulged at all, its unsafe to charge even on the proper charger. If you ever charge LiPOs on the bench, you need a fireproof metal bin wth a lid, lined with firebricks or thick ceramic tiles to actually do the charging in and a dry powder fire extinguisher waiting right next to it.

Why not look for a K3 with a broken screen that at least charges and turns on and make one good device out of the two?

baszek · 03-03-2014, 08:57 AM

Quote:

Originally Posted by Ian.M

Why not look for a K3 with a broken screen that at least charges and turns on and make one good device out of the two?

First I will try to find what is broken in my kindle - it could be just loose usb port or some other easy repair thing.

03-02-2014, 01:31 PM	#1
baszek Member Posts: 13 Karma: 10 Join Date: Mar 2014 Device: kindle 3	kindle 3 (keyboard) not charging Hello I have just bought broken kindle 3 keyboard for a 25$ with shipment. I will have it in home at tuesday. The previous owner said that it's not charging the battery - he even bought new battery and he used it until he completely drained the battery - kindle was not charging new battery either. Could you help me find defect in it ? Any ideas ? First thing I will check with multimeter will be micro usb in kindle - often they are broken or loose. I bought kindle with old battery which is probably completely drained so could I charge it in external charger without I2C - just using + and - ? Do you know if its possible to turn on amazone kindle 3 and use it with a battery without that I2C pins just - and +? - I have plenty of batteries with similar capicity (or I can connect two identical batteries-parallel connection) from mobile phones which have 3 pins plus, minus and some other for measuring temperature. If I manage to repair charging (I hope it will be broken micro usb) then is it possible to charge such a battery from mobile phone (2 pins-without I2C) with kindle?

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03-03-2014, 06:44 AM	#2
Ian.M Connoisseur Posts: 71 Karma: 57134 Join Date: Aug 2013 Device: Kindle 3 GB 3G	Not to be encouraged. If you really want to mess around with charging LiPO batteries outside of the device they are meant to be in, you need a dedicated intelligent LiPO charger that can be configured for the number of cells and cell capacity. An incorrectly charged LiPO is basically an incendiary device. If the battery is excessively discharged or has bulged at all, its unsafe to charge even on the proper charger. If you ever charge LiPOs on the bench, you need a fireproof metal bin wth a lid, lined with firebricks or thick ceramic tiles to actually do the charging in and a dry powder fire extinguisher waiting right next to it. Why not look for a K3 with a broken screen that at least charges and turns on and make one good device out of the two?

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