America's #1 Smart Battery Charger Brand. Still.

Since 1965

The charger that thinks — so your battery never dies.

Battery Tender® smart battery chargers and maintainers keep 6V, 12V, 24V, 36V, and 48V batteries at peak capacity — automatically. ISM (Infinite Sequential Monitoring™) delivers a precise 4-stage charge sequence — Initialization, Bulk Charge, Absorption, and Float — preventing the overcharging and sulfation that permanently destroy batteries.

From motorcycle battery chargers to car battery chargers, marine on-board charging to industrial fleet maintenance — the automatic smart battery charger trusted by OEMs, dealers, collectors, and riders in every season. 60+ years. Still the standard.

Compatible with flooded lead-acid, AGM, gel cell, and lithium (LiFePO4) battery chemistries — Battery Tender® delivers the right charge for every battery type, every time. Whether you need a 12V automotive battery charger and maintainer for your daily driver, an AGM-compatible smart charger for your motorcycle or powersports equipment, a lithium battery charger for your LiFePO4 pack, or a heavy-duty charging solution for fleet, RV, or industrial applications — Battery Tender® has a smart charger built for it.