Battery Tender 3A Charger & Maintainer — 12V/6V Auto Switch (022-0202-COS)

Smart charging that fits your needs

The Battery Tender 3A Charger and Maintainer is a compact, smart device designed to bring automotive batteries to a healthy state and keep them ready for action. It supports both 12-volt and 6-volt systems and is compatible with lead-acid, AGM, gel, and lithium chemistries, giving you a versatile solution for cars, SUVs, and trucks.

How it works

With a full charging cycle, the unit automatically shifts into float mode to maintain proper voltage without risking overcharge. The device also features a solid-state two-color LED that signals when charging is active and when the battery voltage is stable, so you can quickly gauge status at a glance.

What you get

• 3-amp charger and maintainer for everyday use
• Ring terminal and alligator clip combo cable for flexible connections
• 5-year manufacturer’s warranty and lifetime customer support
• Instruction manual for quick setup and operation

Safety and reliability

Designed with safety in mind, the charger is spark-proof during lead connection and automatically detects reverse polarity to ensure a correct, locked-in connection before power is applied. It carries UL/CSA, CE and BC approvals for added peace of mind.

Versatility for multiple battery types

Switch between 6V and 12V with the push of a button. It works with flooded or sealed maintenance-free batteries, including AGM, gel cells, and certain lithium chemistries—making it a flexible addition to your garage or workshop.

• Lead-acid
• AGM
• Gel
• Selected lithium chemistries

Real-world use cases

Imagine preparing a winter-ready start for your pickup, maintaining a seasonal vehicle while in storage, or keeping a classic car’s battery healthy after long idle periods. The design emphasizes portability without sacrificing performance, and the 11-foot combined reach helps you reach power outlets and vehicles with ease.

Why this matters

Rather than a single-use charger, this Battery Tender model provides a reliable charging routine, a maintain mode that guards against under- or over-charging, and a user-friendly package backed by strong support. Possible benefits include longer battery life, reduced maintenance effort, and dependable starts when you need them—though results vary by vehicle and usage.