For the trakpowers, there is a charger/balancer system that is designed to work with the way the pack is setup. If the trakpowers are the only packs you will be using, the trakpower system will work the best. If, however, you are going to have a bunch of different packs laying around, then you might want to consider something like the Hyperion 1210 and lba10 balancer; but you'll need to make an adapter for the trakpower packs. Not a big deal, but it will need to be done.