I used this one before I got a charger with built in balancing: http://www.amain.com/product_info.ph...ttery-Balancer

It depends on what lead you have coming off the charger, but this is basically what you need to connect the battery: http://www.amain.com/product_info.ph...llet-Connector

It has a 2mm bullet to plug into that balance port on your battery.