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?

[meego]

Not sure if anyone is still looking at these forums, but I am trying to get the batteries replaced for the adam I have.

Yes it is still working good, except for the charging problem and I hate to throw it away because of the know issue of the batteries. If anyoe has succesfully replaced the batteries, I would appreciate a link on where it was bought. I tried the avacom.cz site which doesnt seem to have an english link and not sure if the battery can be shipped to Sydney, Australia. Any suggestions would be much appreciated. If responding on the forums is an issue, I would appreciate your inputs on trom.5.cjmk@spamgourmet.com

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.