Things I liked:Charged at 1 amp with my delta peak charger it peaked nicely (1.5 hours or so, wasnt timing!) and battery was barely warm to the touch. Have put more than 2500 rounds through my TM G3 SAS over a three week period with no sign (yet) of running down. Awsome! Things I would have changed:Nothing What others should know:I first bought this same battery (intellect 1600 cells 8.4V) in Japan at Eichigoya in Tokyo except it was the Japanese version (the lead to battery attachment is not as robust nor as strain releived as on the Ameican version) for 39USDand it is awsome. I was very happy to find it here (at Pyramid) for less and with a better lead mount and it charges and runs as good if not better.