On turbo mode: atrocious. But also you can’t see, so it’s whatever.

On normal (extremely bright mode): a couple hours per recharge! Good quality 18650s are basically free (like 5-7 moneys each) so I never find myself having troubles with batteries. I have a D4v2 and a DT8, and the D4v2 lasts much longer but I find myself using the DT8 way more because it’s extremely silly. I swap batteries out every week or two of daily (light) use, and the most I’ve swapped the batteries out in a day is maybe twice? when using turbo mode a lot to take a bunch of indoor photos before I got a phone that takes excellent low light pictures!