8 of 9 people found the following review helpful
Long charging time, cells slightly too wide,
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This review is from: Digital Concepts CH-1800 Overnight AA/AAA Battery Charger with 4 AA 2500 mAh Batteries (Electronics)
The included instruction sheet lists the charging time for these 2,500mah NiMH batteries at *18-20 HOURS*. The charger doesn't even have a voltage shut-off, so it keeps "charging" them even after they're fully charged. So, you don't know when they're fully-charged, just wait 18-20 hours. Of course, continually overcharging NiMH cells will shorten their operational life span (unlike Li-Ion or NiCad).
I also have to note that the cells are too wide. I tried to put them in my XBOX 360 controller, and they would barely even fit. I had to push so hard to get them in that the plastic coating is scratched. I've never experienced this problem with batteries before. I measured the diameter of a Duracell AA cell at 14.0mm, while the diameter of these cells is 14.3mm.
Between the oversized batteries, the outrageous charging time, and a charger that doesn't indicate completion, don't buy these. They suck.