These batteries had an unacceptably short life in my hearing aid remote control. They were either defective or so old that they had lost much of their charge. I will not purchase from this vendor again!

The batteries work well. They are very hard to find any where else.
I always can rely on amazon.com for hard to find products.

Replacement batteries are not inherently exciting. Wait a minute, hold the phone! They shouldn't be. They should simply fit into the intended devices without hassle, power them up effectively, and last for a long time. That's exactly what the Streamlight (remarketed Energizer) AAAA batteries do. They make my Streamlight gleam and they allow my cats to chase my laser pointer's spot for hours on end. It's too bad that all consumer products don't work this unobtrusively and well!

I found instructions online for taking apart a 9-volt battery and getting 8 AAAA batteries out of it. If price is your imperative you can find a how-to for doing this yourself. It drives the price down to about 25cents each. I think I used a Duracell and got 8 batteries for my wife's bluetooth headset.

The pen light is exactly what I needed. The light is a little bluish and bright, but for the rest...great.