• Size Parameters3.7V 3200mAh lithium batteries, size: 18mm(0.7 inch) diameter x 70mm(2.7 inch), (Note: they are longer than the flat-top batteries, please check the battery size before purchasing)
• Superior PerformanceBuilt-in USB-C port, support C-C output, you can charge your cell phone and other devices in case of emergency, easy to charge with the included 2-in-1 USB cable, no need for an additional battery charger (does not support PD fast charging)
• Widely UsesNERMK 3.7V rechargeable batteries are suitable for flashlights, headlamps, toys, remote controls, microphones, radios, bike lights, bluetooth speakers, and other household devices.
• Safe and Efficient: NERMAK 3.7V battery has built-in safety protection against overcharging, over-discharging, over-current and short-circuit, with 1500 charging cycles for longer service life, making it an ideal replacement battery for high-frequency equipment.
• Warm Note: 2* 3.7 Volt Replacement lithium ion battery12 months warranty, If you have any question for our product, Contact us: click the "Ask a question" on our storefront or in "YOUR ORDER" options click the "contact seller"