I'm using 4 of these F-size NiMH cells to power a P7 in a 6D mag, which is driven at 2.8A. It's nice and heavy. 
However, a few days ago, I was loading them into the light, and dropped the first one in rather hard. I noticed the light was dimmer than usual when I turned it on, but thought nothing of it at the time (I assumed I was just getting jaded about how bright it was...). I ran the light for 3 or 4 hours.
When I took the batteries out later that day and checked the voltages, that first cell read 0.00v on my DMM. The others were at about 1.1v. After a rest of about 30 minutes, the 0.00v cell read about 1v, and was increasing by about 0.01v every few seconds.
Was the cell damaged by that drop? Or maybe it wasn't balanced and got over-discharged (I thought they were about the same voltage beforehand, but...). If it wasn't damaged by the drop, was it damaged by being discharged so hard? Or is this the behavior of some kind of protection circuit? (I've never heard of that in NiMH).
Additionally, I've been having a hard time finding a charger that works on these. I tried this Tenergy charger, but a capacitor in it exploded (didn't vent gracefully -- really exploded. There's this fiber stuck to the side of all the components that were facing the capacitor inside the charger.) I also tried this, but it doesn't seem to want to start. Currently, I'm using this to charge them, but it's very slow. I'd like to spend as little as possible, but that's not going to be the case if I keep getting chargers that won't work...
However, a few days ago, I was loading them into the light, and dropped the first one in rather hard. I noticed the light was dimmer than usual when I turned it on, but thought nothing of it at the time (I assumed I was just getting jaded about how bright it was...). I ran the light for 3 or 4 hours.
When I took the batteries out later that day and checked the voltages, that first cell read 0.00v on my DMM. The others were at about 1.1v. After a rest of about 30 minutes, the 0.00v cell read about 1v, and was increasing by about 0.01v every few seconds.
Was the cell damaged by that drop? Or maybe it wasn't balanced and got over-discharged (I thought they were about the same voltage beforehand, but...). If it wasn't damaged by the drop, was it damaged by being discharged so hard? Or is this the behavior of some kind of protection circuit? (I've never heard of that in NiMH).
Additionally, I've been having a hard time finding a charger that works on these. I tried this Tenergy charger, but a capacitor in it exploded (didn't vent gracefully -- really exploded. There's this fiber stuck to the side of all the components that were facing the capacitor inside the charger.) I also tried this, but it doesn't seem to want to start. Currently, I'm using this to charge them, but it's very slow. I'd like to spend as little as possible, but that's not going to be the case if I keep getting chargers that won't work...
plenty of capacity
