History #

20700 batteries, also known as 20700 cells, are a type of lithium-ion battery. They were first introduced in the mid-2000s, and have since become a popular choice for high-power applications. The 20700 cell is larger than its 18650 counterpart, and offers higher capacity and power.

Typical Chemistry #

The 20700 cell typically uses a Lithium Cobalt Oxide (LiCoO2) cathode, and a graphite anode. This combination provides a high energy density and good cycle life. The cells are typically rated at 3.6V, with a capacity of around 2.5Ah.

Typical Use #

The 20700 cell is used in a variety of applications, including power tools, electric vehicles, and consumer electronics. It is also popular in the vaping industry, as the larger size allows for higher power and longer runtimes.

Design #

The 20700 cell is designed to be a drop-in replacement for the 18650 cell. It is slightly larger, measuring 70mm in length and 20mm in diameter. The cells are also slightly heavier, weighing around 46g.

The cells typically have a built-in protection circuit, which prevents overcharging and over-discharging. This helps to ensure the safety of the user, as well as the longevity of the battery. The cells also have a high rate of charge and discharge, making them suitable for applications that require high power.