Please note: 26650 battery is Flat top battery, and 1865 is button top battery! (Not suit for Vape Mods!) 26650 Battery Features: 1.High quality and durable 2.Provides excellent continuous power sources to your device 3.High energy density, long life battery 4.It is good both in low and high temperature perations Specifications: Model: 26650 Type: Rechargeable battery Voltage: 3.7V Size: about 66*25*25mm Color: Blue 1865 Battery Description: Size: 65mm x 18mm No memory effect Environmentally friendly 100% Brand New Battery Type: 1865 Rechargeable Battery Voltage: 3.7v Material: Li-ion Battery Rechargeable times: Up to 1800 times Color: Blue Compatible with: Battery appliances such as emergency lighting, portable devices, power tools. WARNING: DO NOT dispose in fire or heat DO NOT puncture,damage,and disassemble DO NOT mix fresh batteries with used batteries