hey bud... here are you choices, both of them you will need a charger like
http://tinyrc.nexcess.net/shop/product.php?pid=456 that one that they sell here. you can probably find one at radioshack if you just tell them what you are usin it for but anyways. you can get a set of micro connectors that hpi rs4 micros use and wire one set to the battery, one to the esc (the box on the left) and one to the charger. that way when you need to recharge you can just plug it into the charger. or the charger will come with little squeeze clamp clips (i dont know what they are called) and you can just clamp them on to the proper end of the whole pack, not the individual cells. there are other ways too scattered throughout this forum
hope that helps
oh and if you dont have bearings you should get those as soon as you can!