Laptop battery
Laptop (Packard Bell) about 18 months old and only recently gone wireless. Until then used the mains adaptor with the battery in.
On battery recently when got the low power warning suddenly despite the showing nearly full power left. Since then haven't been able to get about more than 40% capacity on the battery even after 12 hours charge..
Questions..
Does this indicate the battery needs replacement??.and
Does using the AC adaptor and leaving the battery in (full charged) cause any harm to the battery??