The Explorer Battery Cassette is the heart of the Explorer 1500 Battery Generator.
The cassette slots and locks easily into place beneath both packs.
The Battery Cassette can be charged while mounted inside an Explorer but it can also be charge independently of a pack which means if you have two cassettes you can use one while charging the other and simply swap the cassettes over to extend your location photo session.
The Cassette can also be charged from a vehicle cigarette lighter with the optional Car Charger.