The Xantrex Battery Monitor helps boaters better manage onboard power and battery life by providing complete battery information. The liquid crystal display shows battery voltage, current, consumed amp hours, state-of-charge and more. The unit can also give information on battery temperature with an optional temperature sensor. Users can program the monitor through a personal computer and store historical battery data through an optional external communications kit. Compatible with 12- and 24-volt DC systems, the battery monitor has a one-year warranty and sells for $275. Xantrex Technology, Burnaby, BC, Canada; (604) 422-8595; www.xantrex.com.