In low power long use devices like clocks i use zinc carbons

In a clock they last at least 1 year with a cost of 10cent per battery

Hi there! Thank you for the question! If the cost is not a question, and you need the longest lifetime (for example, in some sensor where it is problematic to change the batteries) - lithiums will be best. If the price is also important - in my opinion, the cheapest alkaline will be the best choice. Thank you, and have a nice day!

@@filippocara0510 Hi there! A good option for a really low-drain device.. But only for ones with a really low drain.

@@dmitrysysoletin9967 yes that 's true. For high power drain I use ikea ladda 2450mah, for mid drain alkalines and for low drains zinc carbons. I found some really good deals with zinc carbons, like 1€ for 10 and they last long and never leak even when dead