Battery replacement

[ivir]

This week I replaced old internal battery pack with custom build battery pack with Samsung ICR18650-26F (2600mAh). Pack is charged without issues and tablet works again as new. All for less than 50$ including work. I suppose that battery must be partially charged before insert to Adam which doesn't support charge battery from zero.

[Raul]

Could you write more about it?

[ivir]

It isn't so much to write.

I opened Adam as was described at forum. So screws out and slowly with credit card flip out front panel. I started on top left corner to bottom. After flip out display is needed detach cables for touch screen and buttons.

Then I detached power cable from motherboard and battery after release 2 screws.

Battery is pack of 3 Sanyo "AA" Lion battery with U profile. Also there is protection circuit including temperature protection (2 sensors on black cables). Charging circuit is on the motherboard.

I don't have equipment for spot-weld so I ordered at battery shop (avacom.cz) build custom battery pack with 3x Samsung 2600 mAh (á 209 CZK ~ 10$) and spot-welded outputs. Works including soldering was for 20$.

Battery pack was already partialy precharged (11,6V between pins B+ and B- on protection board) so I attached to motherboard and tried start Adam. It started without issue. So I reset battery status and plugin power and waited to fully recharge. After a lot of time LED change color from purple/violet to blue and at system was also reported full charge.

I haven't time fully test, but with turn on wifi (download updates) and reading PDFs at public transport (2 hours) after work day (8h) I was on 60% of battery.

I suppose that previously reported problems was due fully discharged battery pack and charging circuit cannot start. At least Openmoko Freerunner has this problem and needed add some capacitors.

[Trans]

..Battery is pack of 3 Sanyo "AA" Lion battery with U profile...

Really AA? Or maybe 18650-formfactor? They not match, 18650 a little bigger.
And what about U-profile? I do not understand this termin applied to the battery.

[tartutic07]

any pictures if possible .. ? i am sure it would be a big help for others

[macex]

It isn't so much to write.

I opened Adam as was described at forum. So screws out and slowly with credit card flip out front panel. I started on top left corner to bottom. After flip out display is needed detach cables for touch screen and buttons.

Then I detached power cable from motherboard and battery after release 2 screws.

Battery is pack of 3 Sanyo "AA" Lion battery with U profile. Also there is protection circuit including temperature protection (2 sensors on black cables). Charging circuit is on the motherboard.

I don't have equipment for spot-weld so I ordered at battery shop (avacom.cz) build custom battery pack with 3x Samsung 2600 mAh (á 209 CZK ~ 10$) and spot-welded outputs. Works including soldering was for 20$.

Thanks.
Can you also please post the actual website link for the battery?

[laziod]

Does anyone have a good source for battery replacement?