These batteries have a memory.
My guess is your NiCads "remembered" that you didn't use this much and
now it won't let you.
Google up some tips on rejuvenating them. There are a couple of
schools of thought on this. Some go with the freeze them theory and
others like the zap them with a capacitor method.
I just avoid it by not buying cordless things unless I will be cycling
You're supposed to charge those batteries every 30 days no matter if
used or not, otherwise they won't last. Even then they sometimes fail
for some reason. The manual explains the charging schedule. You most
likely will have to purchase a new one for around $69 to $89, them's
I had makita batteries 16 yrs old till they got stolen that still
worked, My ridgids are 4 yrs old, and I never do anything special to
care for them except charge them right. Sears 18v do have a bad rep,
reviews at sears say it. It bet they are chinese seconds.
If you're going to spend $69 - $89 on a battery, find a place that
sells them for $89.
Then take another $20 bill out of your pocket and buy one of these for
(Amazon.com product link shortened)
$20 extra feels better than $40 extra. ;-)
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