The EN-EL 18a is a 2500 mAh Rechargeable Li-ion Battery that is used to power the D4s and D4 Nikon D-SLR cameras. The EN-EL18a Li-ion Battery can be charged using either the MH-26a or MH-26 Battery Chargers.
The BL-6 Battery Chamber Cover must be used with the EN-EL18a battery.
Reviewed by 3 customers
Works as expected. It's nice to have the extra capacity vs. the older EN-EL18 battery.
I use this in my D4s and it's amazing how fast that camera shoots fps! Whenever I'm tracking a flying bird and go to HS shooting this battery supplies more than enough "juice" so that I reach the 11 fps and 100 RAW shots I've setup in the camera menu. I'd buy this again and highly recommend it! I've tried 'discount' batteries before, never again. I had to wait almost 2 months for a spare to become available but I won't waste money on discount accessories, especially since I spent $6400 for the camera body!
When out of power you need a back up then I reach my Nikon EN-EL18a Battery never missing a shoot