This charger has it all with 6- and 12-Volt capabilities, 2- or 4-Amp charge rates. The BikeMaster Intelligent Charger/Maintainer is ideal for charging/maintaining conventional acid batteries, factory-activated, maintenance-free batteries, absorbed glass mat maintenance-free batteries (AGM) and gel batteries. This fully automatic battery charger detects 6- or 12-Volt, reverse polarity, overcharge and short circuit protection in addition to testing if the battery is good or needs replacing. It has easy-to-read LED lights that indicate power on, 6- or 12-Volt selection, 2-Amp or 4-Amp charge rates and the status of the battery charge.
Color-coded alligator clip leads and color-coded quick disconnect battery terminals. 6-Volt mode has a bulk charge rate of 2-Amps; 12-Volt mode has a selectable charge rate of 2-Amps and 4-Amps. A float charge of 1.5-Amps is used for absorption: a constant high current for extended periods of time can damage a battery; to rectify this issue, constant 1.5-Amps low charging current is given until the battery is fully charged (13.6-Volts). The charger monitors the battery voltage: if a 12-Volt battery voltage falls below 12.8-Volts (6-Volt battery falls below 6.2-Volts) the charger automatically restarts the charging cycle; the maintenance charging cycle is repeated indefinitely, thus, allowing the charger to stay connected worry free. Recovery mode is used to revive batteries that are not completely dead but have fallen below 8-Volts; the recovery mode charges at a constant 1.5-Amps; the recovery process automatically switches to the regular charging mode when the voltage reaches 10.5-Volts; the charger will then automatically switch from charge mode to maintenance mode when the battery is fully charged. Sleek, durable composite housing for long service life. Power on indicator: red LED light. Battery voltage indicator: 6- or 12-Volt automatic selection; solid red LED light will indicate battery voltage, if the battery is bad the light will flash. Reverse polarity indicator: red LED light will warn if the battery connections are reversed. Charge current indicator: use the MODE button to select between 2-Amps or 4-Amps. Charge indicator: red LED light indicates the battery is charging, green LED light indicates fully charged battery. Five-year manufacturer's warranty.