Please rest assured to choose our products. Our e-bike batteries are widely recognized, company’s products are mainly exported to the US, UK and so on. The lithium battery is made of high-quality cells, with good safety performance, built-in BMS protection board, and have passed the safety certifications. Sufficient power, long service life, wide applicability. Installation/working of the product, need to return/change, and we will get back to you within 24 hours. Please don’t worry that we will be responsible for the product, good communication can solve the problem better! Our battery can fit most motor kits, for example: Fit for adult electric mountain bike, commute ebike, hybrid bicycle, e trike, fat tire bike, E-folding bike, Pedelec, and Universal. ? The red wire on the discharge cable connects to the positive terminal (+), and the black wire connects to the negative terminal (-); + to +, – to. ? Please confirm the parameters of your bike motor, the voltage of the motor must be the same as the battery voltage e. 36V battery matches 36V bike motor. ? And the power of the your motor must be within the battery adaptation power range. ? Please check the size and baseplate type in the product picture to meet your needs. 1 X ebike Battery. 1 X User Manual. XT60 and Anderson Connectors (Female & Male), and Mounting accessories included.