I'll just say WARNING / CAUTION here.
Do it by all means, but make very sure the battery is 150% secure and is well covered with something that will not dislodge, even consider a double up here, so if one cover does become dislodged, they other isn't.
I know and admit this is likely over the top, but personally and having seen loads of Minis over the years lost to fire from this, I think it's better to be safe than sorry.
I do like the twin tanks and have always run with them.