The Mighty Max automatic smart wheelchair battery charger comes with the round 3 pin XLR connector. The Mighty Max Charger provides an enhanced charging method that will not damage your batteries when left connected. Mighty Max 24V 5A charger also provides a short circuit protection, enabling the product to charge safely in most environments. Mighty Max 24V 5A charges 24V lead acid and Gel cell type Batteries. Most common use with the following wheelchairs: Pride Mobility, Hoveround, Freedom, DDC, Shoprider, E-Scooter Electra, Frank Mobility, Merits Health Products, Theradyne and many more.