... ipBDI is a high cost performance, easy to install Battery Chargemeter (BDI). This battery chargemeter is ideal for golf cars, hunting buggies, ... A 10-bar high light LED displays the state of charge successively, bar by bar. At 70% depth of discharge, ... to install. Recognizes improperly charged battery. Key switch activated LED display. Terminals and Wiring1: Battery + 2: Battery- 3: Output Signal 4: ...