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Connecting through the factory charge port rather than directly to battery terminals preserves the integrity of the battery compartment seal
Short-circuit protection — Automatic shutdown if an output fault is detected
Conversely
The manual selector is deliberately physical — there is no automatic voltage detection
Battery Tender® 12V / 6V Battery Tester Charge N Start Connecting through the factory chargeThe Battery Tender 12V 6V Battery Tester is the fastest way to assess battery health before a storage season, after a long discharge, or when a battery is not holding charge as expected. Designed for both 12V and 6V lead acid batteries, it provides an immediate read of battery voltage and charge state no multimeter knowledge required, no complex settings, no waiting. Who It's For Any vehicle owner who maintains a battery dependent fleet multiple
