Just starting vaping and trying different brands of disposables to decide if I want to invest significant money, but the one thing I've noticed is that the batteries on disposables are terrible and inconsistent. One Blu lasted me three days, another one only lasted one day. The NJOY that I bought at the Walgreens for $8 only lasted 8 hours before the battery went dead and it was still packed with juice that couldn't be used because of dead battery. I have yet to find a disposable that lives up to the promise of being equal to two packs of smokes, not because the juice isn't there to do that, but that the battery goes dead, maybe because it was sitting in the store too long and is old??? Does anyone know what brands of disposable e-cigs have the best battery lifetime?