Honeywell 100005326FRE White Tool-Free End Cap Type: Cap Specification: Holds the battery inside Color: White Compatibility: White Tool-free Thumbweel End Cap For Use With Cordless Imagers with 3820/4820 Feature: Honeywell 100005326FRE White ToolFree End Cap for use with 3820/4820 Cordless Scanner and Disinfectant Housing used in Health Care Applications The thumbwheel end cap design enables users to access and change depleted batteries instead of forcing them to dock the scanner for charging