Amazon.com: SUPULSE LiPo Battery Charger 2S-3S RC Balance Charger 7.4-11.1V B3AC Pro Compact Charger : Toys & Games
Charging 2 x 3S Lipo's in series: please look over my schematic - ESK8 Electronics - Electric Skateboard Builders Forum | Learn How to Build your own E-board
How Long to Charge 1S-4S(3.7V-14.8V) RC LiPo Batteries – Majestic RC