The Carlyle Tools Battery Charger, No. CBC12V20AEA, is a versatile battery service tool that offers three separate functions: beneficial battery charging, power supply mode to support diagnostic and repair applications, and engine starting assistance to overcome a dead or depleted battery. It has customized routines for charging flooded, AGM, spiral wound, deep cycle, marine, and LiFePO4 lithium batteries. The charger provides the current necessary (up to 20A) to maintain the vehicle’s system voltage at a set level to provide an optimal environment for a variety of diagnostic, repair, and maintenance applications. It also offers a rapid “boost” charge to quickly bring a depleted battery above the threshold required to enable the engine to start.