I've bought 10 of these about 5 years ago. They seem to be doing alright, but that's hard to gauge as I don't have a very large demand for 9 volt batteries so I typically do maintenance recharge cycles on these. Unfortunately, I've noticed that these batteries have had tabs rip off when removing them from devices including the charger. I've also had one fail internally somehow between the internal battery cells and the tabs. No idea what the quality problem is there or what to recommend.

I would usually buy 9V batteries but I wanted to try rechargeable 9V batteries. I chose this brand because of past excellent experience with Tenergy's products. The battery charged easily and worked well in the intended device. I would have given it five stars but this battery has not gone through any charge/recharge cycles. I'm not anticipating any problems.

I have used this particular rechargable for a long time, so I know from experience that these do the job..over and over and over.