Keep your RV, marine, or backup batteries charging at the right voltage no matter what the weather does. The ABS-248 temperature sensor plugs into compatible BatteryMINDer chargers and automatically adjusts output voltage based on ambient temperature -- preventing the overcharging that kills batteries in summer heat and the undercharging that leaves you stranded in winter cold.
Battery charging is not a one-size-fits-all operation. A lead-acid battery needs a higher charge voltage in cold temperatures and a lower one in heat. Without compensation, a charger set for 77 deg F will overcharge in summer and undercharge in freezing weather -- shortening battery life in both directions. The BatteryMINDer ABS-248 eliminates that guesswork automatically.
Simply connect the sensor to your compatible BatteryMINDer charger and position it near your battery bank. The charger reads the temperature in real time and trims its output voltage accordingly across the full 0-130 deg F operating range. This is especially valuable for RVers leaving rigs in storage, boondockers running large battery banks, and anyone using solar with a BatteryMINDer charge controller accessory.
Automatically raises or lowers charge voltage based on real-time temperature readings, protecting battery chemistry year-round.
Functional from 0 deg F to 130 deg F -- covers everything from cold-weather storage to hot-climate boondocking.
Comes with a 2 ft temperature sensor lead and a 6 ft extension cable for flexible placement near battery terminals.
Works with ten specific BatteryMINDer 12V and 24V charger models -- see the compatibility list below before ordering.
Standard chargers apply a fixed absorption and float voltage regardless of conditions. In a hot storage bay or a cold northern winter, that fixed voltage is wrong -- sometimes dangerously so for sealed AGM and gel cells. Temperature compensation typically adjusts voltage by approximately -3 to -4 mV per cell per degree Celsius change from 25 deg C (77 deg F). For a 12V battery with six cells, that can mean a meaningful shift in float voltage across a wide temperature swing.
By connecting the ABS-248, your BatteryMINDer charger gains that correction automatically. The result is more complete charges in cold weather and safer float voltages in heat -- which BatteryMINDer states can extend battery service life by more than 100% compared to uncompensated charging.
The ABS-248 is designed specifically for the following BatteryMINDer units. Verify your model number before purchasing -- the sensor port and communication protocol are not universal across all charger brands.
Installation requires no tools beyond what it takes to route the cable. The 2 ft sensor lead connects to the charger's sensor port, and the sensor tip is positioned near (or against) the battery case to read ambient battery temperature. The 6 ft extension cable gives you enough reach to place the charger away from the battery bank while keeping the sensor at battery level -- useful in tight RV compartments or when the charger mounts on a wall above the battery tray.
The ABS-248 is backed by BatteryMINDer's 1-Year 100% Money-Back Manufacturer Warranty and a 5-Year "No Hassle" Warranty -- among the stronger coverage terms in the battery charger accessory category.