Hi guys, i have been using LG HG2 batteries in my single battery Smok AL85.. However I have noticed my battery lifetime decrease rapidly over the month. I charge externally using Nitecore digi 2.. I smoke at 30w on a 0.6ohm coil. I am tryna find the best battery in terms of capacity, i never vape above 8amps. Usually hit between 7-7.5 amps. So dont really need high amperage batteries. Can anyone recommend?