Use this adapter with the 95394 charger to charge up to 4 batteries offline. If you need extra batteries to extend your towing range or if you need to take your batteries home to charge because of lack of electricity in your hangar, this is the solution you need, This adapter only works with XT60 battery connectors (Yellow Connectors). The case is machined from hi-grade plastic. Overall dimensions are 3-1/2" x 2" x 1-3/4" and weighs 1/2 lb.