Removing the drill from the carrying case, locating the power button
and pushing it is nearly beyond his technical skills. He really
should give it to charity as he'll only hurt himself and others if he
were to ever try and use it.
If you are not going to be using the tool on a regular basis, and are
concerned that you won't have a fully charged battery when you need it
because they both discharged in the "box", just keep one battery in
the plugged-in charger all the time.
Any decent modern charger will stop chargeing the battery when it's
full and you'll always have a fully charged battery when needed.
When you pull the battery out of the charger to use it, put the other
one in until you need it.
A neighbor bought a B&D 24V NiCd drill last year. It came with two
batteries and a simple constant-current charger. The instructions said
only that it should finish charging in a certain number of hours.
Some rechargable battery technologies have a relatively high discharge rate,
and a fully charged battery can be dead within a month or even less. Some
rechargable battery technologies have a low discharge rate. For example,
the new low discharge eneloop NiMH batteries still have 80% charge after a
full year of sitting on the shelf. If you don't use a tool very often and
you would like to have a charge after weeks or months of sitting in the
case, I would search for a brand that uses low dischage batteries rather
than a charger that continously tops off batteries with a trickle charge.
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