Looks like a cheap option:
http://www.hobbycity.com/hobbyking/s...dProduct=12104
Will have to put a balance tap and a direct plug to the main leads on the battery. The milwaukee has some sort of built in LVC / charge circuit inside the battery case. Make swapping cells a huge PITA. And at 120 bucks a pack not swapping a dead cell would be plain stupid.
I have a few packs that have all dead cells, plan to get some 2500mah or so lipos that fit and make 7s packs. I have some neu 30c 2500mah cells that will be the 1st to go in.