This 2 x 18650 3.7V Battery Holder can hold 1 18650 7.4 V batteries which can make a 7.4 V  rechargeable battery pack from NiMH / NiCd cells or a 7.4 V battery pack from alkaline cells or it can also be used for one-time use and throw batteries for small DIY projects.

It comes with an Alligator Clips

Note: This product does not include a battery, you need to purchase it separately.

Features:

• Battery type: 18650
• Mounting holes diameter: 18mm.
• Color: Black.