20090 - Battery Doctor® Battery Isolator - 12V / 100 AMP Voltage_10.8V 2) Attach Negative (Black) battery

2) Attach Negative (Black) battery clip to negative post of last battery in the series

and other "negative base" chargers at a fraction of the manufacturer's replacement part price

Barbie Beach Cruiser (Model 76821) [2 Batteries]

610696 - Associated Eqpt AC Cord

Starting Voltage: 12V

20090 - Battery Doctor® Battery Isolator - 12V / 100 AMP Voltage_10.8V 2) Attach Negative (Black) battery100 Amp Battery Isolator Battery Doctor state of the art, fully automatic dual battery controller is suitable for any vehicle with an auxiliary battery. Smaller and lighter than other standard battery isolators, the Battery Doctor Battery Isolator employs electronic switching control technology. Our high performance electronic isolator allows you to charge two batteries from a single alternator, and keeps the starting battery isolated from the second