I wonder if someone can solve a puzzle for me? I bought 2 generic 18v lithium ion battery packs (4Ah) for my Ryobi drills. One works fine. The other, when I put it in the drill on receipt just produced a 'click' and minute chuck movement. Thinking it was not charged, I placed it in my charger (correct one) but it said fully charged after about 5 minutes. I noticed a set of green bars on the battery on a push switch; pushing the switch lit all green bars indicating fully charged. I checked battery voltage: 19.2v. The battery also fails in another drill and by moving batteries between drills I can rule out drill contacts. But at times the battery worked and continued to do so with 'on-off' sequences of the drill trigger until the drill was left for maybe 10 minutes, when the click resumed. I then noticed that if I pressed the charge check button on the battery, and then immediately the drill trigger, the battery worked .. it even worked if I waited for the green lights to go out and then pressed the drill trigger. But wait about 5 minutes and ... click.
Now I thought, in my ignorance, that battery packs were simply batteries in series but clearly there is more to this pack than that. A photo of a part stripped Makita pack shows a circuit board so I assume my Ryobi generic will be the same.
So ... can anyone explain to me what might be wrong with this pack?
Many thanks in advance
Phil
Now I thought, in my ignorance, that battery packs were simply batteries in series but clearly there is more to this pack than that. A photo of a part stripped Makita pack shows a circuit board so I assume my Ryobi generic will be the same.
So ... can anyone explain to me what might be wrong with this pack?
Many thanks in advance
Phil