Note: ● Do not reverse the battery when charging and putting into devices. ● Do not heat, disassemble or put the battery into fire. ● Do not mix old with new batteries or mix with any different types of batteries. ● Do not mix with different capacity of batteries. ● Please fully charged the battery if long time no used or used for the first time. ● The batteries can only be charged by Li-ion 18650 rechargeable battery charger. ● Our battery and charger have the “positive” and “negative” on the product surface. ● Please pull out the plug after battery fully charged or no battery in the charger.