I burn through 2 or 3 AAA batteries each month. 2 years ago, before Christmas Menards had boxes of 48 Rayovac AAA batteries for under $5 each. These were packaged in a cardboard box with 4 12 pack cards inside.
My insulin pump Manufacturer recommends using ONLY energizer batteries. The pump is finicky, it will reject batteries that are not fully charged (If I remove the battery halfway through its life and reinsert it I get an error code and need to replace it with a new battery).
I have had no problems with Rayovac.
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After I use up my supply of Rayovac, I'm considering the new Nickel Metal Hydride rechargeable batteries.
The ones that you buy "pre-charged" Sanyo eneloop claims you can charge them and store them charged, and after 3 years they still retain 75% of their charge.
I sometimes listen to Jack Spirko "The Survival Podcast"
A while ago he talked to Steven Harris about dealing with a large scale blackout. They spent a lot of time talking about the newest NiMH batteries.
Part 1- Episode 939
http://www.thesurvivalpodcast.com/harris-on-blackout-1Part 2- Episode 940
http://www.thesurvivalpodcast.com/episo ... out-part-2
A fight for liberty somewhere, is a fight for liberty everywhere.