Let's start by saying I've had great results with two Maha C9000 chargers I have. They've run though countless cycles. Today I put in four 2000mAH tested AA in for a standard 1/0.5a charge/discharge refresh cycle. After about 2 hours the batteries became super hot and all measured 65-70c. Stopped the charge, let things cool and tried again. I've since put a fan on this one but the question is, has anyone had a C9000 cook cells? I'd sooner think my BC900 would do so (that's why I have the fan in case) than the C9000.
The resistance voltage measure for these batts rang in 1.7-1.9 by the way. Not terrible and certainly not battery cooking bad...
The batteries were probably in a 20 perc state of charge or so when first put in.
Posted from my phone.