I returned my P2V and am awaiting the arrival of my P2V+. However I still have my extra battery. I forgot and left it fully charged and now I have no P2V to discharge it in. I have two questions: 1. Will it harm it if I leave it that way until the new one arrives hopefully in 2 weeks. 2. If it will harm it, how the heck can I discharge it to 40%? Thanks.