This popular 18650 battery is a popular must have. Rechargeable, durable, high-powered, and extremely versatile: exactly what you want in an IMR 18650 battery. Made to work universally with a wide variety of different devices, this is the basic, ready-to-go, workhorse battery. Flat top, 2900 mAh, non-protected, it's the ideal for powering up anytime an 18650 vape battery is needed.