Battery Doctor 20090 12-Volt Battery Isolator (100 Amps Peak)

• Water-resistant (IP62);• Suitable for marine use ;• Smart technology monitors the aux battery & keeps it charged;• Priority charging for starting battery;• Overcurrent & surge protected for vehicles with electronic systems;• Manual override for starting battery;• Charge rate depends on alternator;• Draws 300mA on standby mode;• Manual override button allows both batteries to be wired in parallel for starting;• Includes mounting bracket;• 100A peak;