This rechargeable Battery Pack (DCNM-WLIION) is the power supply source of the Wireless Devices (DCNMWD and DCNM-WDE) within the DICENTIS Wireless Conference System.The Battery Pack is a high-capacity lithium-ion type, capable of providing up to 24 hours (DCNM-WD) and 20 hours (DCNM-WDE), from a full charge. From empty, it takes just about 3 hours to fully charge the Battery Pack with the Charger (DCNM-WCH05). Lithium-ion cells avoid the charge degradation issues associated with other rechargeable battery pack types. This offers maximum flexibility for scheduling recharges.The 'intelligent' Battery Pack has a built-in microprocessor to control charging current and to prevent overloading.