According to the manual, battery grip should discharge itself while it's not in use for some time for save storage. But mine is not discharging.
I didn't use it for a few month and when turned it on, the battery was almost full.
I use the latest firmware.

Hi DmytroK, thanks for your feedback, this has been reported to our engineers for attention, we will come back to you once we get any information, thanks for your patience.

DJI Mindy Posted at 7-22 02:07
Hi DmytroK, thanks for your feedback, this has been reported to our engineers for attention, we will come back to you once we get any information, thanks for your patience.

Are your engineers have any answer for me? I'm on a 2.0.0.9 firmware and my battery in not discharging if not in use. I've just get my ronin out of the box, it was there for a few month and it is still 97%.