Hopefully you can help me with this problem:
In March 2015 I bought a D4s and a spare battery (EN-EL18a). I never had any issue with the batteries. This year, in July, I bought a third battery (to be sure to have power on my trip to Iceland so I wouldn't end up in places where I couldn't recharge and so... end up with empty batteries).
My three batteries have been working well until some three weeks ago.
The batteries lasted for weeks (I mainly do automotive, autosport and landscape photography).
I noticed that a fully charged battery just lasted one week, while not even using the camera. It (the camera - and yes, it was turned off) just was laying on a shelf...
I've read some issues with the D4 and battery drain due to some network settings switched on. I've checked that specific setting on my D4s but it wasn't enabled.
Is my D4s draining the batteries or is the charger MH-26 causing the problems? Can someone help me or give me some advice or tell me what to do?
I've been looking on the net and several Nikon sites but I can't find anything appropriate.