It always seemed that we were short that one basic tool when we needed it, but then we would need it for another year. Granted a lot of this was due to disorganization and misuse by some people, mostly accidental even, many came with the concept of "it's a tool I can
throw it around because that's what it was built for," as we all know, throwing a drill across the
stage and leaving a cordless battery to charge for weeks at a time (cheap chargers and drills especially) is a really bad idea if you want the tool to last.
One thing I did note over the years was that the little 3.6v batteries in a charge - given it was a lighting company, seemed to suffer from
phase harmonics issues in killing off the batteries sooner than they should have. (That’s the assumption I had to explain the problem.) Smaller shop than now with a common
power source, lots of computers,
power tools and at times striking the ark on a hundred or so movers at a time. Was going
thru batteries left and right - most just after their warranty.
I installed a 30min timer
switch on my 20min. battery charger. Once the timer was done charging, it shut itself off. Believe this mostly solved the problem but not totally sure. Once the cordless screwdriver was discontinued, I both started buying the DeWalt, and after market batteries for the Panasonics. Could be the after market batteries were just plain better quality, but still believe that the half hour timer helped save batteries. Trickle charge is no longer in
effect - I do use my cordless tools and change batteries sufficient that I don’t persay need to worry about draining or lack of use.
Idea perhaps? Granted most tools use 1 hour chargers thus would need a one hour timer. Also if not used for more than 30 days, a NiCadd battery probably should be drained of charge as per the manuals I remember reading. They say also though that the trickle charge is fine for up to that period of time without damage. Never really had a need for the larger
voltage batteries.
If 30 days at a time without using the batteries, dischage them. Buy a flash light that uses that battery type to do so... (forgot, we also had the 14.4v flashlights.) The flashlight will better discharge a battery than a cordless tool with
velcro around the trigger. Discharging a battery with a cordless tool could damage the tool or even possibly start a fire.
Always ensure your tool is in locked or
neutral between direction also when storing them. Might be old, but I have heard said that a variable speed trigger when touching something sufficient to start the motor running can get hot enough to start a fire. Probably not true but good policy just in case at least so you don’t
pick up the tool and find a drained battery because it was rotating slowly all night long.