The 18650 means 18 mm in diameter and 65 mm in length. The 18650 is just the size of the battery. HC18650 lithium battery is one of Huacheng’s most mature and stable products, which is widely used in digital products and new energy vehicles. It has achieved a combination of safety (high stability performance), long life and low cost (factory direct sales) and is still at the forefront of the industry. And our company’s lithium battery can be combined and can be customized to meet customer requirements.