Hello all. I've been trying to get my Nitecore P25 to behave itself, and so far I've presumed that its bad behaviour has been due to shoddy cells. However, I just bought a brand new XTAR 3400mAh cell, and after charging it up to 4.2 volts, my flashlight is being... odd. It won't stick in the highest output mode for very long, and when it does, the blue status light flashes the low battery warning. Additionally, occasionally the flashlight will flicker shortly after turning it on. It's almost as if the torch doesn't realise it's using a fully charged cell and is downgrading itself to compensate. Is this a known problem with these? Google didn't tell me much.