If you're planning on using the Shark Injector to add performance engine software to your BMW, a battery charger such as this one is required. We recommend this charger unless your car has the Daytime Running Light feature activated. In that case a charger with a 20amp setting is required. (For more information on performance engine software, click here)

Features:

3 convenient charging modes

2 amp trickle charge mode

10 amp standard charge mode

55 amp engine crank assist mode

fully automatic

on-board circuit breaker protection

LED status indicators

engine cranking assist

UL certified