18700

History #

The 18700 battery size was first introduced in the early 2000s. It was designed as a replacement for the 18650 battery, which was becoming increasingly popular in consumer electronics. The 18700 was developed to provide a larger capacity than the 18650 while still maintaining a similar form factor.

The 18700 battery size was initially used in laptop and notebook computers, as well as other electronic devices such as digital cameras. However, as the demand for higher capacity batteries increased, the 18700 was adopted as a standard battery size for a variety of devices, including electric vehicles and power tools.

Typical Use #

The 18700 battery size is commonly used in electric vehicles, such as electric cars and electric scooters. The 18700 is also used in a variety of power tools, such as drills and saws. Additionally, the 18700 is used in many consumer electronics, such as laptops, tablets, and digital cameras.

The 18700 battery size is also used in a variety of medical devices, such as hearing aids, pacemakers, and insulin pumps. The 18700 is also used in a variety of industrial applications, such as robots and industrial automation systems.

Typical Chemistry #

The 18700 battery size typically uses Lithium-Ion (Li-Ion) or Nickel-Metal Hydride (NiMH) chemistry. Li-Ion batteries are the most common type of 18700 battery, and they offer higher energy density and longer lifespans than NiMH batteries.

Li-Ion batteries are composed of a cathode, an anode, and an electrolyte. The cathode is typically composed of a lithium-containing material, such as lithium cobalt oxide or lithium iron phosphate. The anode is typically composed of a carbon-based material, such as graphite. The electrolyte is typically composed of a lithium salt, such as lithium hexafluorophosphate.

NiMH batteries are composed of a nickel-containing cathode, a hydrogen-absorbing alloy anode, and a potassium hydroxide electrolyte. NiMH batteries offer lower energy density and shorter lifespans than Li-Ion batteries, but they are typically cheaper and more environmentally friendly.

Design #

The 18700 battery size is typically cylindrical in shape, with a diameter of 18mm and a length of 70mm. The 18700 is slightly larger than the 18650 battery, which has a diameter of 18mm and a length of 65mm.

The 18700 battery size typically has a nominal voltage of 3.6V and a maximum voltage of 4.2V. The capacity of the 18700 battery size can vary depending on the type of chemistry used, but typical capacities range from 1000mAh to 3000mAh.

The 18700 battery size typically has a maximum continuous discharge rate of 10C, which means that the battery can safely discharge up to 10 times its capacity. The 18700 battery size also typically has a maximum charge rate of 1C, which means that the battery can safely charge up to its capacity.