KASOTEK NEW High Precision RC Watt Meter and Power Analyzer 130 Amps With LCD Screen Watt Meter and Power Analyzer 130 Amps with LCD Screen Verifies sufficient operating voltage under load Prevents peak currents damaging battery, ESC, motors, wiring and connectors Individual cell balancing.Set cutoff voltages, check battery capacity & health Confirms proper battery charger operation (connect between your battery and charger)