The Streamlight 76375 is a replacement battery stick. It's designed for the PolyStinger HAZ-LO flashlight collection, which were made to be used in hazardous locations, atmospheres, and environments like petro-chem facilities and industrial sites. This Streamlight NiCd battery stick is 2600mAh, rechargeable and should last for many uses. You can use this stick as a replacement battery or to have another battery with you on hand when you need it most on the job.