A protective cap that covers the charging socket and contacts of a strobe battery pack to keep out dirt and debris during storage or travel when the pack is off the strobe. Works with Li-Ion, NiMH, and Ni-Cad packs for DS125, DS160-series, and DS230-series strobes. It is not a waterproof seal; the pack must be attached to the strobe for waterproofing. Weighs about 1 oz.