A 16.8v 3500mAh 18650 lithium battery pack is a rechargeable energy storage unit that combines multiple individual 18650 lithium-ion cells in a specific configuration to deliver a total output of 16.8 volts and a capacity of 3500 milliampere-hours (Mah).

1. Voltage (16.8v): This battery pack provides an output voltage of 16.8v volts. Voltage is the measure of electrical potential difference between two points and determines the energy available for use.

2. Capacity (3500mAh): Capacity refers to the amount of charge a battery can store and deliver. In this case, the battery pack has a capacity of 3500mAh. Which means it can theoretically deliver a continuous current of 3500 milliamps (3.5 amps) for one hour before being deplete.

3. 18650 Cells: The "18650" designation refers to the specific form factor of the individual lithium-ion cells used in the battery pack. An 18650 cell is cylindrical in shape, approximately 18mm in diameter and 65mm in length. In addition these cells are commonly use in a wide range of applications, including laptops, power tools, electric vehicles, and more.

4. Lithium Battery Pack: This is a pack made up of multiple individual 18650 lithium-ion cells connected in a specific arrangement. The arrangement can affect the overall voltage and capacity of the pack. As well as its discharge characteristics and safety features.

5. Rechargeable: Lithium-ion battery packs are design to be rechargeable, allowing them to be use multiple times before their performance starts to degrade significantly.   However, proper charging and discharging practices are important to extend the lifespan of the battery pack.

Package Include:

1 x 16.8v 3500Mah 18650 lithium Battery pack