We started using rechargeable 9V batteries at church for the wireless mics a couple years ago. There’s a plethora of cheap Chinese batteries available and just started off using those. If we got four or five charges out of them then we’d be doing pretty good and come out ahead of alkalines in terms of cost and waste. We started going through those cheap batteries real quick; the cells would physically burst during a slow charge on a fairly nice dedicated 9V charger. I’ve probably bought ten different brands that all had two things in common: they were under $3 shipped and were made in China.
With the introduction of low discharge batteries like Eneloops in AA and AAA formats, I kept wishing they made a 9V version. Some eventually popped up on Ebay but were well over $10 each. After our stock of batteries started running low again, I found a company called Bear Wobble that offered a full line of low discharge NiMH batteries. I picked up two 9V’s to try out at the same price of eight cheap Chinese 9V’s. Their performance so far has been awesome.
The original two 9V’s I bought are still in weekly rotation and have had zero problems. I picked up four more so we can charge two ahead of time and have them in reserve. All have worked flawlessly and show no signs of giving out. I’ve also picked up a number of their AA and AAA batteries which are competitively priced against Eneloops and perform just as well.
Two big thumbs up for Bear Wobble’s low discharge NiMH batteries. I’m done with the Chinese garbage on Ebay.