The Replacement Macwheel Li-ion Ebike Battery Pack 36V 48V 10.4Ah 500W 750W Electric Bike GEN3, also known as the Flex Stride Hybrid E-Bike, meets industry standards with CE and RoHS certifications. This lithium battery has a capacity of 10 - 20Ah and is available in both 36V and 48V options. The battery can be assembled using either a 10S4P, 10S5P, or 13S4P method and includes a DC 5.5*2.1 charge port. It is compatible with 250w, 500w, and 750w motors and comes in a sleek black color. The dimensions of the battery are 76*68*420mm/96*68*421mm and it is designed to fit in the Intube position. It weighs approximately 3.6Kg and does not include a 5V USB port