Okay, but could be better
I purchased these to power a Minolta SRT-101, which takes an increasingly hard to find PX625 (or equivalent) battery. The original PX625 batteries used mercury and are no longer available in the US. Duracell once manufactured a 625A cell that was a perfect fit, and despite being a slightly different voltage (1.5V vs. 1.35V) worked great... but it's difficult to find too.<br /><br />So I thought I'd give these little units a try. The battery itself is a zinc-air battery that seems more stable and long-lived than the Duracell batteries were. However they are physically adapted to the PX625 form-factor by use of a metal ring that the battery sits in. This ring seems fairly cheaply manufactured, and of the three batteries I got, one was unusable (the ring would not sit level on the battery), and one appears to be usable, but required me to "reset" the ring to its proper position. The third (still in its package) looks to be correctly aligned, but I won't know for sure until I use it whether it has any problems.<br /><br />All that said, these accomplish the goal of powering my aging SRT-101 and at a pretty reasonable cost.
Rating: 3 stars