9V Batteries-Li-ion Rechargeable 9V Batteries,1200mAh Capacity 9Volt Battery 2Pack Lithium Battery for Smoke Alarms, RC Toys Walkie-Talkie 2Colors Black+White

I needed to get 9V batteries for my metal detectors. I started pricing out 2 packs of Duracell 9V -- about $9.00... off brands like Voniko Ultra Long Lasting 9V Alkaline Batteries, 4 Pack, 7-Year Shelf Life was $6.29 --on sale. I was about to buy them and thought: You know what be cool is a rechargable 9V that you can plug directly into your USB cable.I found these and bought them -- where have they been all my life? On sale for less than $10 for a pair of them -- one black, one white. I like the idea of the color code. I comes in a nice holder which has room for the dual charging cable.It took a while to fully charge -- and it works flawlessly in my detector.Have no idea how long they last... but it's been a few straight hours of contiunous use with no glitches.The only problem with them -- if you want to call it a problem -- is that these batteries are feather light. It was a bit disconcerting when I first tried them -- don't let the weight fool you -- they work as good as the alkalines -- only with multiple reuses.

RECOMMENDATION:Thumbs Up: These work fine in std 9v applicationsTHE GOOD:1. These are reasonably priced and are 1200mwh at 9v, which seems about typical for LION batteries of this class.2. There is a charging cable included that allows you to charge both batteries at once which is a nice plus.3. There are charging indicator lights on the top which let you know the charging status.THE BAD:1. So far nothing. I wish that they were higher capacity, and you can buy lion 9v batteries at over 4x this capacity at a higher price of course.

In all fairness to the product, I have not used it yet so I can't really comment on performance. I would like to point out that the only way I can see to charge them is by USB C cable which is supplied. I shouldn't complain as I charge several items this way - phone, tablet, earbuds ... That said, I would like to be able to charge them in a "conventional" (old school) charger (photo attached) such that I could cycle or refresh them now and again. They charge easy enough with the cables but I'm at the mercy of the charger's output and prefer to charge "low and slow."I admit to being a little skeptical of their capacity of 1200mAh but I'll have to wait and see.On the whole, I'm sure they are going to be fine for use in battery testers and multi-meters.I don't like knocking a product before putting it through its paces but I would have preferred a different or additional charging method.

These are not bright, but they will let your find your way around a dark hotel room, or just when any light is better than no light. Tuck one into a pocket when out hiking. Leave one in the car. Have one on your nightstand at home or when traveling.

Junk. Worthless. One battery is completely dead, measuring 0.03V. The other is 4.11V. These are supposed to be 9V batteries. Tried recharging multiple times with different cables and USB power supplies.Now I have to waste my time packing these up, boxing them, printing a label and wasting gas driving to UPS store to return. Wasting more time writing this review, but hopefully it will save someone else from making the same mistake I did of buying this junk.

These did not hold a charge. Very weak.

Item was well packed and the batteries charge and perform well. Great deal at my time of purchase

Love these, batteries are expensive & these are real easy to charge & re-use, bonus that your don't need an extra charger for them.