I thought it would.. And I hope it does..
I have the HLD- 9 Grip for the MK11 and have not tried it out yet what I don't need is more weight.
Ohhh Yes. My first outing with my first E-M1 I took my two new fully charged batteries to Sea World for the day they ran out of charge early in the afternoon.
I was shocked, as my Canon at the time battery used to last around 1000 shots. Remembering over 5½ years ago I think the Olympus Batteries maybe 350 shots ?