Hoping someone can help me. Got my beautiful Riva kit 2 1/2 weeks ago. Love the Riva and love LF. Have been using these batteries about 3-4 hours a day on average. Four days ago one stopped taking a charge and last night the other died. Is there a trick to these to bring them back to life? I got some eGo pass-throughs to keep me going but the Riva is my favorite and I am bumming. Anyone else have this problem or did I just have really bad luck?