Having tested more than two hundred models of batteries, I was sure that there are no bad alkaline (alkaline) batteries and the worst batteries have capacities only one third less than the best and most expensive, but last year alkaline batteries appeared, which are much worse the rest.
Conventional AA alkaline batteries have an energy capacity of 2-3 Wh. The good cheap batteries that I write about often have a capacity of around 2.3 Wh.
"Reduced capacity" AA batteries provide only 1.3-1.5 Wh.
Of course, it is better not to buy batteries of reduced capacity if there are many other good and cheap ones on sale.
Bad batteries can be easily distinguished by their weight - they are much lighter than conventional ones. Normal AA alkaline batteries weigh 22-24g, and these are about 18g.
I haven’t come across bad AAA batteries yet, but just in case, I’ll say that normal AAA alkaline batteries should weigh 11-12 g.
Note that you cannot determine the capacity of good batteries in this way: a 23 g battery does not necessarily give more energy than a 22 g battery.
Also note that all this applies only to alkaline (alkaline) batteries. Saline batteries are much lighter. Lithium, ahead of alkaline in weight, are also light.
It has always amazed me that all batteries on the market are very similar to each other. Alas, now there are bad batteries that are different (the Chinese have learned to "under-report"). Surely, such batteries will soon appear on sale under well-known Russian brands, so prepare the scales. :)
© 2020, Alexey Nadezhin
The main topic of my blog is technology in human life. I write reviews, share experiences, talk about all sorts of interesting things. My second project - lamptest.ru. I test LED bulbs and help me figure out which ones are good and which are not.