Archived from the Tools In Action forum (Accessories). This thread is read-only.
I have 2 18v Hitachi EBM1830 batteries that came with a 8 tool combo kit. Tried using my hammer drill, 1 battery works fine, the other says fully charged on the charger and when I use it with the drill, it runs about a minute before the drill quits. I can immediately place it back on the charger and it shows fully charged. Both batteries read 20.4v with a voltmeter. Bad battery?
It’s weird they show the same voltage charged like that, but yea sounds like something wrong with the one pack if the other one works just fine.