Battery Tender 5A 12V Battery Charger & Maintainer – Smart Auto Charge for Cars, SUVs & Trucks

Fully automatic charging made simple

The Battery Tender 5A 12V charger delivers a complete charge and then maintains your battery at a healthy level without guesswork. Its four-stage charging cycle — qualification, bulk, absorption, and float — recharges efficiently and preserves state of charge for extended periods. Once the recharge is finished, the unit transitions to float mode to help keep the battery ready for use when you need it.

Designed with AGM batteries in mind, this charger also handles a wide range of lead‑acid chemistries, from small Powersports batteries to large deep‑cycle packs used in automotive, marine, agriculture, and construction equipment. The result is a versatile solution that supports multiple vehicles and tasks, so you can keep several machines ready without swapping chargers.

Four-stage charging that protects battery health

• Qualification ensures safe power delivery as the battery accepts charge.
• Bulk provides a fast, full-charge push to reach the target voltage.
• Absorption completes the top-off while managing heat and current levels.
• Float maintains the full charge with a steady, low-level current after charging is complete.

The charger includes practical safety and reliability features. A 72‑hour timer helps protect marginal batteries, and spark‑proof connections with automatic reverse‑polarity detection ensure a correct, locked‑in setup before power flows. It carries UL/CSA, CE and BC approvals for added confidence in everyday use.

Compact, versatile, and easy to use

With an 11‑foot total reach (6 feet of AC cord and 5 feet of DC output), the unit is easy to position where you store or park your vehicle. Its lightweight, plug‑in design makes setup quick, so you can connect and forget until you’re ready to drive again.

What’s included matters: a 5‑amp charger, ring terminals and alligator clip cables, a 5‑year manufacturer’s warranty, an instruction manual, and lifetime customer service. The two‑color LED indicator provides at‑a‑glance status, and adaptive charging will resume full output if the battery voltage dips under load.

Real‑world use cases

Seasonal vehicle storage or routine maintenance for a fleet becomes more predictable with this charger. It supports cars, SUVs, and trucks, helping keep multiple batteries in prime condition between drives. Marine, agricultural, and construction equipment owners can rely on a single charger to top off diverse batteries as needed, reducing downtime and uncertainty.