Equus 3721 Battery and Charging System Monitor

This battery and charging system monitor displays the condition of your battery and charging system instantly. It protects the engine computer and 12-volt accessories from damaging surges when jump starting or recharging. You can easily plug into the vehicle’s cigarette lighter or power receptacle to monitor battery and charging system voltage. It has an LCD screen which displays the measured voltage with a bar graph to indicate battery charge level and it also has color-coded LEDs which quickly identify the battery’s charge status. The head pivots for easy viewing and angle adjustment.

Equus 3721 Battery and Charging System Monitor Features
* Displays the condition of the battery and charging system
* Designed for 12-volt negative ground systems
* Protects the engine computer and 12-volt accessories from surges
* Easily plugs into a cigarette lighter or power receptacle
* Head pivots for easy viewing and angle adjustment

Equus 3721 Battery and Charging System Monitor Reviews

Seemingly just another auto gadget fortunately the Equus 3721 is more sophisticated than its ponderous description. A breeze to connect to any car’s 12 Volt electrical system. Simply push into the lighter socket or an auxiliary power outlet now found in many newer vehicles.

With the engine running the instrument constantly displays battery condition with an LED light; amber when marginal, red if the battery is discharging. A green light indicates a correctly functioning electrical system. All is well with both battery and, most importantly, the alternator.

The Equus is also an accurate voltmeter. Digital read-outs give exact voltage in the electrical system. Potential alternator problems or a failing battery will be indicated by below normal voltages, plus an amber or red light. Extra information is a battery icon graphically showing total battery charge. Tending towards erratic read-outs, and therefore unreliability, it is not the unit’s best feature.

Equus’s instruction card is easy to understand. The unit is well made, sturdy, easy to connect and to transfer to any 12 volt system not having its own voltmeter. Also, as a supplemental monitor in an RV, or a bigger boat with a remote 12 Volt outlet in a sleeping area far from the main instrument panel, overall battery condition condition can be monitored while camping or at anchor.

Good value for money; very useful. From personal use, recommended.

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