battery levels

Trying to find the following information using Litchi and the battery display. The battery display (not voltage or %) red along with green and then a number which changes depending on your distance to the home point. 1) Does the number represent the flight time before RTH is suggested or total...

It's just about to become winter in Pittsburgh and my P3P will be spending more time in storage than in the air. I am quite familiar with aircraft battery storage levels, but it's unclear how to store the transmitter battery level. Currently it's at 60% and asking for a recharge. Would this...