In this case, too much is never enough. That's why we give you more than you'll need. The EOS D30 uses a recharegable lithium ion battery pack. Attach the optional BG-ED3 battery grip, and now you've got enough room for two battery packs. Ready for more? Jack into an AC power source with the Compact Power Adapter CA-PS400 and DC coupler DR-400. Both of these accessories are supplied in the EOS D30 Standard Kit.