This functions of the battery lock. Lock the battery inside the bike frame. The lock is also the battery’s power (on/off) switch. Before riding, please turn the key to open the battery’s switch. DCH 009 folding ebike battery. Li-ion 18650 Brand cell. Folding ebike, city ebike, electric bicycles. 800 – 1000 Times. Do not put the battery in water and keep the battery in a cool dry surrounding. Do not use or leave the battery near a heat temperature (in fire or a heater). Do not reverse the position and the negative terminals. Do not open the battery if you are an amateur, it is very dangerous. Do not short-circuit the battery by directly connecting the positive and negative terminals with metal objects. Do not transport or store the battery together with metal objects such as hairpins, collars, etc. Do not directly solder the battery and drill the battery with a nail or other sharp objects. You must use a qualified charger for the battery, also when charging the battery, you must have an adult nearby. To be safe, children can not use this battery. Q: What type of this electric bike battery? A: It is li ion battery, Chemical is Li(NiCoMn)O2. Q: What is the difference between li ion battery, NI-MH battery and Lead acid battery? Q: What’s temperature range of charge and discharge? A: Charge Temperature: 0 to 45°C and Discharge Temperature: -20 to 65°C. Q: What kind of cells used on this electric bicycle battery? A: Different capacity with different cells, we make the battery with original A grade Brand and high quality domestic cells, all can be customized as your requests. Q: Do your e-bike battery come with charger? A: All of our e-bike batteries come with charger. We have normal charger and fast charger. If you need fast charger please contact with us. Q: Do your electric bike batteries come with BMS? A: Yes, Our batteries all with SEIKO IC BMS, with stable performance. Which can protect the battery avoid short circuit, Overcharged, Over discharge and Over current. Q: Can you provide OEM and ODM service? A: Yes, We are a professional Electric Bike Battery manufacture with factory, which produce all kind of high quality E-bike lithium batteries as customers’ requirements and designs, welcome to place OEM and ODM orders and visit our factory.