You should isolate the problem by replacing 1 part at a time.
7 months in storage should not have made the batteries any more dangerous than they were, unless they dipped below 2.5v and were in that state for a while. If you stored them with some charge on them (3.5v+ or so), they should be absolutely fine.No they take about 4 hours to charge, sometimes 5-6 if I stupidly drain em fully & it's in my D4 and they usually don't last the day, just depends if I use my tank or dripper. I Unfortunately have let the Rx completely die & I need to get them out before that happens. I've ALWAYS bought reliable good Amp batteries. Before I started using these my friend lent me 3 of his new Vtc5 & they last the same as my Samsung pink Qs so that's why I figured even though my batteries were out of commission for awhile they were safe to use. Having to buy all new gear & juice I will definitely by new batts when possible. IF I THOUGHT they were unsafe I definitely would've put those 1st on my list. I have 7 sets if 3 in rotation so I think I'm good. If I'm wrong & they shouldn't have sat for 8 months or so plz let me know!!