These are quality rechargeable 18650 button top lithium-ion batteries with protected circuitry (69-70mm length) that provide reliable power for AGM thermal scanners and thermal scopes, Rix Storm V2's, Leap series L6R, L3R and Stride Lites (Pocket K3 and Storm V1 series run on shorter flat tops not button - order the flat tops instead) These buttons also work with NocPix 18650's