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.