OBDResource LED Battery Monitor for 12V–72V Batteries — 10‑Segment Waterproof Gauge, Reverse‑Polarity Protection

OBDResource’s LED battery monitor is a plug-and-play meter that reads 12V–72V lead‑acid or lithium packs and shows remaining capacity with a 10‑segment waterproof display.

This compact, panel‑mount gauge helps you monitor battery charge across a wide range of electric vehicles — golf carts (Yamaha, Club Car, EZGO), motorcycles, lawn mowers, forklifts and other battery‑powered equipment. It supports selectable voltages (12V, 24V, 36V, 48V, 60V, 72V), offers reverse‑connection protection, and provides a clear 10‑segment LED bar (1 red, 2 yellow, 7 green) to represent approximate state of charge in 10% increments.

How do I set the monitor to match my battery voltage?

Use the built‑in DIP switch to select the voltage that matches your battery pack. The meter ships defaulted to 12V, so confirm and change the switch before first use to ensure accurate readings.

• Open the meter housing and locate the DIP switch array.
• Set the switch to one of the supported voltages: 12, 24, 36, 48, 60 or 72V.
• Consult the product chart for exact switch positions and power on to verify operation.

What installation options are available for different vehicles?

The gauge supports two wiring and mounting approaches: keyed or keyless power connection, and either snap‑in slot or drilled panel cutout. No external power source is required — it draws directly from the monitored battery.

• Wiring: key switch or direct keyless connection to the battery terminals.
• Mounting: insert into a compatible slot, hangout style, or drill a 37×25 mm (1.5×1 in) panel hole.
• Plug‑and‑play setup with supplied installation accessories and simple wiring instructions.

How accurate and durable is the LED capacity display?

The meter uses a 10‑segment LED bar to indicate remaining charge in roughly 10% steps; it initializes with a triple flash on power‑up and then reports the battery level. The unit is rated IP65 for splash protection and built for low power consumption.

• 10 LEDs: 1 red, 2 yellow, 7 green — visual steps approximating 10% increments.
• Auto sleep to reduce draw, and high test accuracy for routine monitoring.
• IP65 splash resistance and heat‑resistant components for outdoor use.

What safety features protect the meter and battery during wiring?

The device includes reverse‑connection protection so accidental swapped polarity during hookup won’t permanently damage the meter. Standard wiring best practices still apply to avoid shorts and ensure longevity.

• Reverse polarity tolerant — safe if positive and negative are swapped during installation.
• Stable operation when mounted correctly; avoid exposed crossed wires to prevent shorts.
• Built‑in protection reduces risk during field installations and maintenance checks.

Who is this for: technicians, fleet managers and DIY owners who need a rugged, easy‑to‑read battery capacity indicator for various electric vehicles and equipment. Choose this gauge if you want a versatile monitor that works with multiple battery chemistries (lead‑acid, lithium, LiFePO4, 3–15S lithium‑ion), supports several voltages, and installs quickly without an external power source. Free installation accessories and technical support are included to help with setup and troubleshooting.