Dear Friend,Good day! We are professional lithium battery manufacturer in China, and we always devote to providing our customers with good batteries and service, OEM service and customized battery pack also could be provided. And below pls find some of our batteries below. Lithium ion rechargeable battery 18650 3.7V 2600mAh 21700 3.7V 4000mAh Lithium polymer rechargeable battery 063450 3.7V 1200mAh 1260100 3.7V 10000mAh LiFePO4 battery IFR32700 3.2V 6000mAh LiMnO2 battery CR123A 3V 1500mAh LiSOCL2 battery ER14250 3.6V 1/2AA 1200mAh ER14505 3.6V AA 2400mAh ER18505 3.6V A 3600mAh Warmly welcome to contact me if any interests in our batteries. Best regards, Henry