This is the Minelab GPX replacement Li-Ion stock battery. This battery is used on the GPX 4000, 4500, 4800 & GPX 5000. The battery has a built in Amplifier to help boost signals on the GPX series metal detectors.
Headphone jack is 1/4″.
Headphones, power cord or chargers are not included.
Part number – 3011-0227