@BGR @BGR schrieb: Sure, after discharging the battery till 8V i leaved it for a while and after few minutes battery voltage rised up to 11 V. This I did undestand. But the 11 V follow up are not resilient; as soon as you take out charge, the voltage will most probably drops down below ~ 8 V. Then the charging can not start. But it is difficult to find the bug from far away. You should ask an electronic professional, who works in the PC and Laptop business. Or go to a PC repair shop, may be they can do a test of the charging circuit on the main- or powerboard. daddle
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