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Prices may varyThis product ranks #7 of 18 in Battery Charger / Maintainer.Three above it ↓
Last reviewed June 5, 2026
TL;DR Confirmed reliable for FLA, AGM, and 6V batteries, with selectable 6V/12V output that is a genuine differentiator at this price. LiFePO4 mode is claimed, but a community review documents a mode-switching failure, so use a dedicated lithium charger for that job.
A 4-amp smart charger with selectable 6V/12V output and ISM adaptive charging. It shifts to float maintenance after a full charge and auto-resumes if voltage drops under load. Community feedback confirms full charging of a depleted car battery in a single day, plus reliable long-term storage maintenance on cars, motorcycles, and RVs. It ships with alligator clips and ring-terminal leads on 11 feet of combined reach.
Best for owners of stored or rarely driven vehicles such as classics, seasonal cars, and motorcycles, and anyone who needs 6V for vintage electrics. Skip it if LiFePO4 is your primary chemistry; the mode-switching issue makes a dedicated lithium charger the safer bet.
UL, CSA, CE, and BC certifications are all claimed but none are independently database-verified. Charging lead-acid batteries in an enclosed space without airflow produces hydrogen gas, so run the charger in a ventilated area. Standard e-waste recycling applies, and the 5-year warranty reduces how often the unit needs replacing.
Marketing copy from Battery Tender, via Amazon. Not editorial.
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