Suppose I have a sentimental remote control or clock that I may not check often. Which kind of battery is least likely to leak? I know alkalines leak pretty easily.
Dry cell? Don’t think so since the casing is part of the reaction
Ni-MH?
Lithium?
Within any particular category, you’ll find good and bad examples - and all of the common battery types contain liquid or paste electrolytes, and so could end up leaking if faulty or badly made.
If you can find a lithium polymer battery in the size you want, that shouldn’t leak (but the failure mode for these is that they explode and catch fire, instead)
So rather than shopping for category, you’d probably be better off shopping for quality. The ‘Procell’ product line (from Duracell), for example, is an alkaline battery, but comes with a leak resistance guarantee.
Oh they have guaranteed leak resistant batteries? That’s just what I want. Wonder if they can be found in Singapore.
Maybe check shops selling or hiring sound and light equipment - radio mics and other pieces of small stage equipment often use batteries of ordinary size, but this is a market sector where the customers take quality and reliability seriously.
a lithium battery will last a long time. 9V style are marketed that they can last up to 10 years (note that is the upper limit of its lifetime). a bad effect is they last much longer than other types ans you forget to check because you don’t need to do so frequently.
Dry cell and alkaline are filled with a paste electrolyte, so both can leak. The NiMH cells I’ve seen torn down have their electrodes and electrolyte in a spiral sheet, so I’d assume they’re less likely to leak. Don’t know about lithium.
NiMH batteries will lose more charge over time than alkaline or lithiums, although the newer low discharge NiMH batteries are much better. How long will you go between checking the batteries and how long do the batteries have to last with limited use?