Black & Decker GC818 Instruction Manual page 2

LEAVING THE BATTERY PACK IN THE CHARGER
It is OK to leave battery packs on charge for long periods of time. The charger has a
maintenance mode which gives the battery pack enough charge to stay "topped off". If
however, the tool is not expected to be needed for more than 30 days, unplug the charger
and store battery pack in a cool, dry location. NOTE: A battery pack will lose its charge when
kept off of the charger. If the battery pack has not been kept on maintenance charge, it may
need to be recharged before use. A battery pack may also lose its charge if left in a charger
that is not plugged into an appropriate AC source.