there are 2 kinds of stock chargers. one that connects to the 4 wire balancing connector, and the other has 2 wires that hook up to the jcs connector on the battery. if you have the 4 wire balancing type, you can safely charge whatever 3S lipo you like as long as you have an adapter to plug in to it's balancing port (i made an adaptor to charge my thunder power lipos with my stock charger, and i've been problem free for months. well, free of battery problems anyway.). if you have the 2 wire style, i'd recommend getting a balance charger instead. charging a 3S lipo with 2 wires is pretty sketchy, especially if you aren't checking balance somehow.