These little guys have a ton of power. You may want to definitely consider a 2S battery for power pack F if you are a novice though. One thing to be aware of if you are new is that the proper reputable chargers do not have a connection to charge this. You will need to either buy a connector and solder one on or do a bit of modification ala MacGyver to charge it. Be careful if you do my MacGyver mod on the charger/balancer though as you now risk the chance of crossing the wires. Don't cross the streams, bad things will happen. Red to red, black to black.