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