12/24 V Battery Negative-Terminal Disconnect Switch

Stop a parked battery going flat. The switch fits over the negative post and lets you isolate the circuit by hand, without undoing the terminal clamp each time.

Isolate the battery without tools

• ✅ Stops slow drain. Cut the circuit while the vehicle or boat is stored, so the battery is not flattened by small loads.
• ✅ No clamp to undo. The switch sits on the post, so isolating power takes a turn of the knob rather than a spanner.
• ✅ Fits 16-17 mm posts. Check your battery post diameter before ordering; variants A, B and C differ in design.
• ✅ Zinc-alloy body. A metal body that stands up to the conditions under a bonnet.

Technical details

• Voltage: 12 V / 24 V
• Post diameter: 16-17 mm
• Body: zinc alloy
• Variants: A, B, C

Key specs: Voltage: 12 V / 24 V · Post diameter: 16-17 mm · Body: zinc alloy

Measure the post, pick the variant, and stop the drain.