Lithium ion batteries (sometimes abbreviated Li-Ion) are a type of rechargeable battery commonly used in consumer electronics. They are currently one of the most popular types of battery, with one of the best energy-to-weight ratios, no memory effect and a slow loss of charge when not in use. They can be dangerous if mistreated. The batteries, packs, and chargers listed here are for use only by qualified individuals. Please ensure that you have sufficient knowledge in handling these products before purchasing. Do not charge or use unattended. Only charge the batteries and packs in a fire proof container or surface.