FX LION NANO ONE=Best BMPCC4K/6K Battery Solution?

The BMPCC4K & BMPCC6K are notorious for it's short battery life. What is the best way to power the BMPCC4K? NP-F970? V-Mount? Here is what I have learned
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--Gear I use! --
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GH5 mk2 if you're feeling fancy amzn.to/2Wx2LAh
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