This is a compatible replacement battery (Cameron Sino part CS-SHW100SL) for Sennheiser/EPOS IMPACT SDW 10-series DECT wireless office headsets. It replaces the original Sennheiser battery parts AHB552826TPC and 1000806, and is listed for the SDW 10 HS headset used in the IMPACT SDW 5013, 5014, 5015 and 5016 systems, the DW 10, the EPOS SDW 10 and, per the battery maker, the GSP 670 gaming headset. As DECT headset batteries age their talk time falls; a new cell restores a full day of calls without replacing the whole headset, which suits contact centres and offices maintaining a fleet of existing headsets. The battery is a 3.7 V lithium-polymer pack rated at 360 mAh (1.33 Wh), measuring about 26.9 x 26.9 x 5.7 mm and weighing roughly 32.6 g, and it connects through a short lead with a three-pin plug. Replacement involves opening the headset's battery compartment. This is an aftermarket part manufactured by Cameron Sino, not an original EPOS part, and should be charged using the headset's normal base station or charger.