3.7V 2600mAh Li-ion power battery, same voltage, same size and higher capacity (increased 18%) compare with original battery. Replacement battery fits for Wahl 5 Star Series, Magic Clip Cordless, Senior Cordless, Cordless Sterling 4, Lithium Ion Cordless, Cordless Designer, Beretto, Super Taper Cordless, 93837-001. Professional Battery Management System (BMS) provides multiple protections for over-charge, over-discharge, short-circuit, over-voltage, over-current and over-heat. Battery size is 2.75'' (70mm) long and 0.75'' (19mm) diameter. Please confirm the battery size and connector (plug) to avoid ordering the wrong product. Does not fit Wahl trimmers. Easy to install, local after sale team guaranteed 7/24 response to online messages. 1 year Limited warranty. 3.7V 2600mAh Li-ion battery, same voltage and same size compare with original battery. Compatible With Wahl 5 Star Series, Magic Clip Cordless, Cordless Designer, Senior Cordless, Cordless Sterling-4, Beretto, Super Taper Cordless, 93837001 93837-OO1 93837OO1. Professional Battery Management System (BMS) provides multiple protections for over-charge, over-discharge, short-circuit, over-voltage, over-current and over-heat. Easy to install, local after sale team guaranteed 7/24 response to online messages. 1 year limited warranty.