the combo is great starter package and work well for 60 sized engine and smaller. The blade has a higher charge rate so don't do it. The power core battery is a very small 12v gell cell. I wouldn't recommend going to haigher charge rate unless you used a computer charger that can detect the statuse of the battery. I charge mine with a triton. But I already had one for all my other batterys that require this kinda of charger

[link=http://www2.towerhobbies.com/cgi-bin/wti0001p?&I=LXCJG7&P=0]triton[/link]