Waterproof Battery Meter 12V DC Voltmeter LED Digital Display Voltage Gauge Battery Tester for Marine Car Truck Boat RV
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Questions & Answers
This is not an electronic medium.
There is no drain on the battery (as low as a tiny LED light) so it can be used with an RV. My boat uses it for extended trips and it works perfectly.
This is a universal battery meter that fits most DC 24V batteries
Please note that a 48 volt meter is not available