I have a PC ARK (model P90, made by Twinhead) laptop that has gone dead.  It is about 3 years old, a Pll 300.  I let it sit for several months and now the battery will not charge - it has 3 lights on the front that all would light up when it was charged; now only one light will come on.  The battery was getting where it would not hold a charge long before this happened.  It will not work with only the adaptor plugged in - I assume because the battery is gone.  If I pull out the battery, the one light will not even come on - I don't believe it would ever work w/o the battery in on the adaptor.  Is there any way to confirm that it is indeed a bad battery?  A replacement goes for $170 from Twinhead, so I don't want to pay this
for something I don't need.
Thanks much,
Edna

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