battery recomendations please.

Hi all,

I am planing a trip into the deep dark Welsh woods waterfall hunting and don't want to run out of electricity.
I am sure one battery will be enough but better to be safe, its a bloody long walk in.

Any recommendations on 3rd party batteries for the D810? Are they worth the saving.

RRP on EL15 is £69 here but I have found it for £28.29 from expedite.

Thanks

I have a couple of EX-PRO from ebay which have a good reputation but i can only find them for the D800 dont know if the D810 are different.

I have seen this Duracell replacement for Nikon EN-EL15 Battery, you would have to double check if it will fit your camera.

Nikon Duracell DRNEL15 replacement for Nikon EN-EL15 Battery

I am using Vivitar batteries with great success. The price was great, they at least have a "brand name" stamped on them, and they are fully compatible with the camera and charger. They display the correct status and such when charging and using. I think I get a few more shots from them than my Nikon battery too.

Amazon.com : (2 Pack) Vivitar EN-EL15 Ultra High Capacity 2500mAh Li-ion Batteries for NIKON DSLR D810, D750 D7100, D7000, D800E, D800, D610, D600, NIKON 1 V (Nikon EN-EL15 Replacement) + MagicFiber Microfiber Lens Cleaning Cloth : Digital Camera Bat

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I have about 10 Wasabi batteries, cheap and compare well with Nikon batteries.