I have a Cordless Senco collated screw gun that I don't use constantly, and is now out of production. To get the most years out of the batteries, what is the best way to store them? Does temperature matter?
NiCad batteries don't store well and tend to leak. Inspect them at regular intervals for a crusty appearance around the ends. Occasional full discharge and recharge will extend the life better than no use at all. NiCads should always be fully discharged before recharging. If not, they tend to "remember" the shallow discharge level and not permit future discharge below that point. If the NiCad batteries go bad, replacement cells are available but you may need to solder them into the original pack housing and terminals. My last Makita drill had NiCads which died. I replaced them with a LiPo battery pack which holds a charge for months and lasts longer than the NiCads. You can buy a charger made for radio controlled plane LiPo batteries if it is for the same voltage and amp rating.