One-Liner: Battery Tender® is the global leader in smart battery management, providing advanced chargers and maintainers designed to extend the life of your vehicle’s battery.
Full Description: Since 1965, Battery Tender® (by Deltran) has been the gold standard for vehicle storage and battery maintenance. Unlike traditional “trickle chargers” that can overcharge and damage a battery, Battery Tender® products feature an Automatic Four-Step Charging Program (Initialization, Bulk Charge, Absorption Mode, and Float Mode). This micro-processor-controlled technology monitors the battery’s status and automatically switches to a maintenance mode once fully charged. Whether you own a classic car, motorcycle, ATV, or boat, Battery Tender® ensures your engine is ready to start whenever you are, saving you money on costly battery replacements.
A: Most traditional chargers provide a constant current, which can lead to overcharging and “boiling” the battery fluid. Battery Tender® is a “smart” maintainer that senses the battery’s voltage and automatically stops charging when full, switching to a safe “Float Mode” to keep it topped off without damage.
A: Absolutely. It is designed to be left connected 24/7. It is the perfect solution for seasonal vehicles—like motorcycles in the winter or RVs in the off-season—to ensure the battery stays healthy and fully charged.
A: Most models are compatible with all Lead-Acid, Flooded, AGM, and Gel cell batteries. Many newer models, such as the Battery Tender® Junior 800 or Selectable series, also feature specific modes for Lithium (LiFePO4) batteries. Always check the specific product label for compatibility.
Flashing Red: Not connected or not charging.
Solid Red: Charging (Bulk stage).
Flashing Green: Battery is 80% charged and in Absorption Mode.
Solid Green: Fully charged and in Float/Maintenance Mode.
A: Yes, it is extremely safe. All Battery Tender® units are designed to be spark-proof and feature reverse polarity protection. If you accidentally connect the red clip to the negative terminal, the unit will simply not turn on.
A: Battery Tender® chargers are designed to charge and maintain healthy batteries. For safety reasons, most units require the battery to have at least 3 volts of remaining charge to initiate the charging sequence.
