Dear friend,How are you? As a battery manufacturer in China more than 10 years, and mature technological level and good service are the best advantages of our batteries, and below pls find some battery models which sell well. 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 Warmly welcome to contact me if you want to know more. Thanks and best regards, Henry