I bought 2 batteries with my Nikon, and one of them failed within a year. I bought 2 aftermarket and they are still going strong, as is the 2nd Nikon pack. They're just battery cells in the little cartridge, I've used a lot of LiPo, LiFePO, NiCd, NiMH, and other stuff. Never had any issues with batteries of the same chemistry causing failures, like a flashlight that only runs on Duracell and not Eveready.
That said, follow the manufacturer's recommendation if in doubt - don't take the word off somebody on the internet over their written guidelines.