Battery Tender OBD-II Adapter Cable for 12V Battery Charging — 22" Cord, 3A Trickle, Solar Compatible

Battery Tender's OBDII Adapter Cable lets you charge and maintain a vehicle's 12V battery safely through the OBD-II port using a 22-inch cord with a 3 amp output and SAE quick-disconnect.

Designed for technicians, DIYers, and anyone who stores or seasonally uses vehicles, this adapter cable removes the need to access battery terminals for maintenance charging. It pairs with Battery Tender chargers or approved solar panels to deliver a steady 3A trickle charge through the standard OBD-II diagnostic connector, keeping modern cars, motorcycles, ATVs, and other 12V systems ready without repeated manual hook-ups.

How does the adapter connect to my vehicle?

This cable plugs into the vehicle's OBD-II port and uses a 22-inch tether with an SAE quick-disconnect to attach to a compatible charger or solar panel. The length gives reach for common port locations, while the SAE connector simplifies swapping chargers or removing the cable when not in use.

• Plugs into standard OBD-II diagnostic port found in most 1996-and-newer vehicles.
• 22-inch cable allows flexible routing from dash to exterior-mounted chargers or panels.
• SAE quick-disconnect for fast, tool-free connection to Battery Tender chargers.
• Designed for inline connection—no battery terminal access required.

Will it safely charge my 12V battery and work with solar chargers?

The adapter is built to deliver a controlled 3 amp charge suitable for maintaining 12V batteries without overcharging when used with the proper Battery Tender charger or compatible solar power supply. It is intended for maintenance and trickle charging rather than fast bulk charging of a dead battery.

• 3 amp output supports steady float/maintenance charging profiles.
• Solar-compatible design allows connection to approved solar chargers or panels.
• Works with Battery Tender systems that regulate voltage and current for safe charging.
• Not intended as a high-current starter or rapid-recovery charger for deeply discharged batteries.

What vehicles and situations is the cable suitable for?

This adapter fits most vehicles with an OBD-II port and is especially useful for stored, seasonal, or infrequently used cars, motorcycles, RVs, and powersport machines that need long-term battery upkeep without repeated terminal access. It's also helpful for fleet vehicles and workshop environments where quick, repeatable charging connections save time.

• Cars and light trucks equipped with standard OBD-II ports (post-1996 models typical).
• Motorcycles, ATVs, and UTVs with compatible OBD-style diagnostics or adapter-ready ports.
• Stored or seasonal vehicles that need continuous maintenance charging.
• Service shops and fleet vehicles where easy access and quick disconnects improve workflow.

Who is this for: The Battery Tender OBDII Adapter Cable is ideal for vehicle owners and mechanics who want a tidy, repeatable way to maintain 12V batteries without exposing terminals or repeatedly lifting hoods. If you use Battery Tender chargers or solar maintenance systems and value a secure, simple connection to a vehicle's OBD-II port, this 22-inch, 3A adapter streamlines charging and reduces wear on battery clamps during long-term storage or fleet maintenance.