So I've gone through about 8 pairs of 25r's. I love this battery, cheap, high-drain, good amp rating. The only issue I have found about them is their shelf life, in mods regulated or unregulated. From my "research" these batteries will last you a month or two before you start to notice a faster battery drain. >3 months and they die almost half as quickly and >4months and they are pretty much useless. My VTC5's and 4's have outlasted these batteries, and I've had them for almost a year, even longer with my 5's. I don't build low, 0.4 the lowest, and I mostly stay at around 1ohm. Unless I'm in TC mode then I'm at around 0.1-0.15. So I'm not killing these batteries. A plus is that they are super cheap and easy to replace.

I'm going to be buying different batteries from now on to try and find the best battery for me. I will update my findings as I go on, as some sort of quasi-science experiment. Just wanted to get this out there for anyone who was experiencing the same thing and didn't know they weren't alone.