12 of 13 people found the following review helpful
A great option over standard NiMh or NiCd batteries,
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This review is from: PowerGenix PGX-4AAZiNc-1.6v High Voltage Rechargeable AA Batteries - 4 Pack (Electronics)
I have been using these NiZn batteries for nearly a year. As an EE, I was intrigued by the higher open-cell voltage.
Indeed, this higher voltage allows for better performance in applications where battery voltage has a significant impact; e.g. Digital Cameras, electric razors, electric toothbrush, flashlights, fans, etc.
The only drawback is that you MUST use a charger designed for these batteries. The higher voltage and charging characteristics require special circuits.
Be aware also that their mAh rating may not last as long as NiMh cells with the same rating, as the higher voltage means they deliver higher current as well (depending on your application). However, with many digital cameras shutting down at about 1.15V, these batteries will outlast NiMh due to the higher 1.4V knee as the batteries become depleted.
I have 12 of these AA cells; at this point they have performed as expected. I recently returned from a trip, using only one set of two AA cells in my digital camera. I never needed my spares.