I just started vaping and I bought a starter kit from a local shop (Kanger t3s clearomizer and eGo c twist battery 650) I am having problems with the battery already (not holding a charge for more than 1 hour or so of vaping) I have followed all the shops instructions as far as charging (never overnight, unplug after green).Is this normal? I have already ordered another kit (innokin vv with a Kanger Pro tank 3) but I would like to pass this kit on to my wife. Should I try to take it back to the store and get another,or is this just what to expect?