Stick to £1 PANASONIC pack, theese Kodak will not give you doulbe the life.. Aldi.. Agreed great value and a Which best buy, use them in fire alarm and Hive unit etc.. Last a very long time.
I make a quick assumption on the initial weight on pickup of a battery pack, gives you a rough idea to start with.
I have been using these for the Christmas tree lights, still going strong after over a week.
Primark sell alkaline 10 for something like 1.60. Excellent batteries
There is a such a tiny difference between any Alkaline battery that a difference in price between 17p and 25p is huge. So I certainly wouldn't avoid these. The last pack I bought were 5+1 for £1 and they are comparable to Duracell etc. Don't really buy Alkaline anymore though. edit: also the Aldi and Lidl batteries are never there when I go in.