On Friday, 19 July 2019 18:39:51 UTC+1, wrote:

I opened a new package of Kirkland brand AA batteries but when I put
them in the device I got the flashing LED mesage of low voltage. Out
of 6 batteries 3 were bad. Measuring the voltages one battery measured
.82 volts, another 1.1 volts, and a third one measured -87 mV.
Negative? Really? Yeah, I thought that too. But I made sure the meter
leads were correctly placed. So I guess something weird is happenening
to these batteries while they are sitting in the package. Maybe they
are getting ready to leak. I'm thinking that package needs to go back.
to Costco.
Eric

I've had some with small negative v too. No idea what the chemistry is that's making that happen.

As for brands, most are much the same. ZnC and alkaline certainly aren't, but otherwise they're not a lot different. All are liable to leak when flat. ZnC sometimes leak when half flat.


NT