This is a direct replacement battery cell for the Night Provision BX-550. All Li-ion batteries are subject to diminishing capacity through prolonged use. The BX-550 was designed for quick and easy replacement. Use any flat head tool to unlock the battery case from the BX-550 headlight to remove and replace. 

Specifications:

• Votage: 3.7v

• mAh: 2400

• Cell Type: 18650 Li-ion

Compatibility:

• Night Provision BX-550