MC> But could the high temps of the charger be a problem?
I think so. Of course the cells could be nearing their lifecycle
limit, too. IMHO cells should never be hot in the charger, either
becauses it charges them too rapidly or it is a closed lid charger
without good venting. It shortens their life. RC models people
superquickcharge their cells at insane currents, but they also usually
use industrial grade batteries which are more permissive, expensive
chargers with computer connection and conditioning and they are all
insane anyway ;-)
Good light!
fra