It seems like the batteries for my D750 take an absurdly long time to charge. On was on the charger for at least 8 hours and didn’t show as fully charged. I have two batterers, on Nikon and one off brand. Both take a similar time to charge.
Is this normal or should I get some new batteries and/or charger?
It sounds abnormally long to me. This is the El-15?
Yes, that is the one.
Were these with the Nikon charger? It does sound oddly long. Not sure, but perhaps a full drain and recharge cycle might get it to show correctly (just grasping at straws here)?
Yes indeed, with the charger that came with the camera.
My EN-EL15, battery age 1, takes less than 3 hours from almost empty to fully charged. I am also using the Nikon charger which came with the camera.
2-3 hours for mine. My off-brand one is a little faster but drains faster too. It did come with a car charger though so it’s nice to have a “plan-B” to keep in my bag,