【Rechargeable Lithium-Ion Cylindrical Battery】The model 18650 battery pack combines three individual cells into one single unit, offering enhanced voltage output and capacity. Each cell within the pack operates at a standard voltage of 3.7 volts. When these cells are grouped together, the pack provides a combined total voltage output of 11.1 volts (nominal 12V), suitable for powering various electronic devices and applications 【Enhanced Capacity 2600mAh】This battery pack boasts a total capacity of 2600 milliampere-hours (mAh). This capacity ensures prolonged usage before requiring recharging, making it ideal for applications requiring sustained power supply over extended periods.