Left Pod Only

When driving or riding my bike I use the right pod only (left ear closer to traffic), leaving the left Pod in the case. When I'm at work my cubicle has a wall to the left and co-workers to the right. I'd like to be able to use the left Pod only and charge the right for commuting. Anyone found a workaround for this? Also, call me crazy, but I don't want to over use the right battery and have the wear on them out of balance. Thoughts?