Battery only charges to 87 %

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I got a new battery for my laptop but it never fully charges.

I have done as the instruction says, charged and fully discharged
several times but the power indicator never says more then
87 % (well, the first time it said 87, then 90, then 87, 87) .

Discharging takes aroun 4 hours with the screen on and the
disk activity lamp flashing about every 5:th second so I
hope the battery is sound. After charging for 24 hours
the battery is not warm so I suppose the charger is not
putting a lot of current through the battery to charge those
last 13 %.

But I am not sure. Can anybody tell me if I can trust the
battery? If the battery is OK, is there any way to make
the system show 100 % instead of 87 when the
battery is fully charged?

The battery is Panasonic 4460 but I could not find
anything about the problem on their home site

Thanks for any answer
Anders


.

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