11-20-2018, 02:57 PM | #1 | |
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Papwerwhite 6th gen doesnt work
Hi there
I have here a Paperwhite DP75sdi (6th gen Paperwhite 2013) which is impossible to turn on. When connected to my debian-system it says: Quote:
The battery however haves 2.8V. I am mechanical engineer, but no electronics specialist. Does it mean the battery is ok and something else is broken? Or do I have to replace the battery? Thank you |
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11-20-2018, 03:11 PM | #2 |
Grand Sorcerer
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If the fully charged voltage is 2.8V it is nearly dead.
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11-20-2018, 03:19 PM | #3 |
eBook Enthusiast
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Definitely. The battery voltage (when fully charged) should be 3.7v. Fortunately if you’ve disassembled the PW to get at the battery, replacing the battery is easy.
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11-20-2018, 03:23 PM | #4 |
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OK, thank you.
For the hints and for the fast response! I'll order a battery. |
11-29-2018, 01:10 PM | #5 |
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So, the battery is here and build in.
After charging its the same situation. The device doesn't turn on. Ok, now i have an spare battery but I would prefer an working device. Any hints? |
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11-30-2018, 06:52 AM | #6 |
C L J
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Who put the battery in? If you did it, perhaps check that you've done it correctly.
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11-30-2018, 08:25 PM | #7 |
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It would be pretty hard to screw up the battery installation on one of these. (See attachment.)
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12-01-2018, 02:19 AM | #8 |
C L J
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Maybe the battery is a dud?
I'm just throwing out suggestions. The only battery I ever changed was in the Sony prs 505, and a techie friend did it for me. It was successful, but the second battery never did hold the charge for as long as the first. |
12-01-2018, 02:42 AM | #9 |
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I understand. I wish I knew more about fixing these, but I'm afraid it looks like an issue with the system board or memory. Someone on the Kindle Development forum might be able to give a better diagnosis.
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12-01-2018, 05:33 AM | #10 |
the rook, bossing Never.
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Old stock batteries are poorer than new made. The charge capacity of Li tech drops with use and age. The actual cycles don't count if you don't go below 30%, just total AH delivered and replaced.
Was the new battery reading over 3V? I'd not expect a new one to give a fully charged voltage as they are usually stored at about 2/3rds capacity, about 3.4V. You can manually charge unplugged using a current source, or a resistor to limit current from 5V to about 100mA. You need to monitor temperature and terminal voltage. Stop if more than 40 C or 3.6V. This will tell if the problem is the charging circuit has failed on the Kindle and if either battery is OK. A dead battery will heat without charging. Eventually it would go on fire, which is why power circuits on anything with a lithium battery are usually designed to switch off/disconnect if battery is too low and not attempt to charge if the battery seems to be at the end of life. |
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