18650s are great for a variety of projects. The only problem is that its difficult to actually wire to them. Soldering is dangerous and could damage your batteries and using electrical tape is inefficient. These 18650 battery holders are great for allowing you to interface with your batteries. Not only do they keep your cells tight and secure, these 1865- batteries also come with leads so you don't need to solder to the connections. Take note these batteries are placed in series not parallel.
Types: 1x 2x 3x 4x 18650 Battery