A Battery Tender® charger is the core of your battery maintenance system — but the accessories you pair it with determine how convenient, versatile, and effective that system becomes in real-world use. The right accessory transforms a charger from something you have to actively manage into a seamlessly integrated part of your vehicle maintenance routine.
Battery Tender has engineered a comprehensive accessory ecosystem designed to work with the brand's full charger lineup. This guide covers every major accessory category and explains when each is the right choice.
Ring Terminal Harness with Quick Disconnect
The ring terminal harness is the most popular and most recommended Battery Tender accessory for any vehicle that is regularly stored or maintained. The harness consists of ring terminals that attach permanently to battery posts and an integrated quick disconnect plug that mates with the charger output cable. Connecting the charger takes 5 seconds; disconnecting takes 2 seconds. The rubber boot covers the plug during storage, preventing corrosion.
The quick disconnect is spark-free — the charger performs a battery check before energizing the output — making it safe to connect while the charger is already plugged into AC power. This is particularly valuable in enclosed spaces where traditional cable connection carries arc risk. Ring terminal harnesses are available in standard lengths and as extended versions for vehicles where the battery is in a remote location such as a trunk or under the rear seat.
Alligator Clip Lead Set
Battery Tender clip leads are the standard connection method for batteries that are regularly removed for charging or for applications where the ring terminal is not practical. Quality alligator clips bite cleanly onto battery posts and terminal studs, maintaining positive contact without slipping. Battery Tender clip leads are heavy-gauge, fully insulated, and rated for the charger's full output current.
Use alligator clips when charging batteries removed from the vehicle, for emergency charging situations where you need quick access to any battery terminal configuration, or for applications where a permanently installed harness is not practical. For vehicles that are charged frequently in a fixed location, transitioning to ring terminals provides a cleaner, more reliable connection.
Extension Cable
The standard Battery Tender charger output cable reaches approximately 60 inches from the charger. For vehicles where the charger is mounted on a wall several feet from the parking position, or for large vehicles where the battery is far from any convenient hook-up point, an extension cable provides the additional reach needed. Extension cables maintain the full current rating of the charger and include the same quick disconnect plug and socket system as the standard harness.
For permanent garage installations where the charger mounts on the wall and the vehicle parks in a fixed position, an extension cable with a ring terminal harness on the vehicle creates a clean, always-ready connection point. Drive into position, walk to the wall, pull the extension cable, and plug in — battery maintenance takes 5 seconds per vehicle.
Fused Ring Terminal Harness
The fused ring terminal harness adds an in-line fuse to the positive lead for applications where electrical safety is a priority. Marine installations, vehicles with sophisticated electronics, and any application where a wiring fault could cause a fire benefit from the additional protection of a properly rated in-line fuse between the battery post and the harness wiring. The fuse is sized to protect the harness wiring against short circuit without interfering with normal charging current.
Tender to Tender Cable
For installations where two Battery Tender chargers share a single AC outlet through a power strip, a Tender-to-Tender cable allows output sharing or daisy-chain connections in specific configurations. This accessory is most commonly used by collectors with multiple vehicles in a garage where power outlet locations are fixed and creative cable routing is needed.
Choosing the Right Accessory for Your Application
For a motorcycle, ATV, or powersports vehicle that stays in one location: ring terminal harness with quick disconnect is the optimal choice. For a car or truck with occasional storage: ring terminal harness provides the most convenient routine charging access. For a boat with permanent onboard charger: WaveCharge units include their own marine-grade harness and connections. For emergency or portable use: alligator clip leads provide flexibility across any battery configuration. For a garage wall installation serving multiple vehicles: extension cables with ring terminal harnesses on each vehicle create a clean, professional multi-vehicle charging setup.
