Most manufacturers will state that the life of batteries in terms of the number of charging and discharging cycles. I remember reading from somewhere that rechargeable batteries has a shelf life even when the batteries are not used.
For e.g., when the batteries are not being used, they will still be "dead" say after 24 months or so. I also heard that for infreqently used rechargeable batteries, it is necessary to store them at a very low temperature (about 10 deg. C) in order to to prolong the shelf life.
I intend to buy a cordless screw driver mainly for use in driving screws on cabinets, walls etc. And I will use it only about 3 to 4 times per year. And if the batteries really have shelf life, it would not be econimcal. Would it be better to get the corded tool instead?
Thanks!