The big Ofna chrome top box can't use a Lipo due to the amount of amps that the motor draws. But you can use the Lipo's inthe new Ofna truggy box with dual 750 motors, the Mugen starter box and other similar boxes that use two stick packs. I have the Mugen box and HT500 Lipo and it is the BOMB! It'l last all weekend starting 2-3 cars. On the balance plug, you just need to get the correct balance adapter. Check out MaxAmps website for picks of all the different types of adapters. Amainhobbies also has a starter box Lipo and different balance adapters. If you call their 1-800 customer service number, and tell them what charger and balancer you have they will hook you up with their battery and correct adapter (if you need one).
Best regards,