I bought a bunch of LR Boge cartos, I think they are 2.0. I got them to go on a 3.7 mod I bought but it has not yet arrived. I was using them with ego batteries but the batteries do not last long. I have a Echo 4.2 volt 1300mah battery. Will that work or is it too much for it? Whats the worst that could happen, blow the atty or kill the battery?