The Sennheiser EW-D Charging Set (article 508862) is the rechargeable power kit for Sennheiser's Evolution Wireless Digital range. It combines the L 70 USB charger with two BA 70 lithium-ion battery packs, which fit the EW-D SK bodypack transmitter and the EW-D SKM-S handheld transmitter in place of AA batteries. It suits presenters, bands, churches, schools and rental users who run EW-D systems every day and want to stop buying disposable batteries. This supplier listing also includes the NT 5-20 USB power supply to run the charger from mains. Each BA 70 is rated 3.8 V and 1.72 Ah, and the L 70 is a desktop USB charger for the packs. The set weighs about 462 g and the charger measures roughly 180 x 133 x 83 mm. Sennheiser covers it with a two-year warranty. Transmitters are sold separately.