Ever wondered why the batteries are named in 123 or 123a? You must be thinking what is the difference between them? What is the usage of these batteries?
Actually, there are no functional differences between 123 vs 123a batteries in layman terms. They are just manufactured by different manufacturers. But an over-speculative mind would find 123a to have an edge over 123 on the operating range. In contrast, 123 has slightly more capacity.
123 Battery vs 123a Battery
As you can see, there is no competition between 123 vs 123a batteries. Basically, they are the same product but produced by different manufacturers. It is up to you which one you prefer.
Resource:
- battery naming standards: https://en.wikipedia.org/wiki/List_of_battery_sizes
- how lithium batteries work: https://www.explainthatstuff.com/how-batteries-work.html
- battery safety features: https://www.ul.com/services/battery-safety-testing
- non-rechargeable lithium battery shelf life: https://www.panasonic.com/global/energy/product/primary/lithium.html