This battery pack is designed for exclusive use with the EOS-1D. It has a rated voltage of 12V & a rated capacity of 1, 650m Ah, higher than the previous NP-E2. It can be recharged using the NP-E2's current charger, & recharges in about 120 minutes. The seams that come into contact with EOS-1D are lined with silicon rubber packing to enhance water & dust resistance.