The HLS4278-M is a direct replacement for the OEM BTRY-LS42RAA0E-01 that is used in the Symbol LS4278 Barcode Scanner. It provides longer cycle life and extends the device's operating time. - Contains the highest quality battery cells. - Provides excellent discharge characteristics. - Provides longer cycle life. - Extends operating time and reduces total number of batteries needed. - Rigorous testing including temperature, vibration, shock, drop, short circuit, and overcharge.