Most devices & gadgets are rechargeable nowadays. The only thing I have that still requires batteries is a headlamp but even those are available in rechargeable varieties. House smoke detectors need a battery too.
Most devices & gadgets are rechargeable nowadays. The only thing I have that still requires batteries is a headlamp but even those are available in rechargeable varieties. House smoke detectors need a battery too.
Obsolete would imply a better in every way alternative. Kinda think they fall into the technology category of timeless and always useful. It’s hard to think of a safer, cheaper, higher capacity, disposable and more utilitarian form factor. Kinda like asking “will shovels ever become obsolete?”
9V batteries are absolutely obsolete and only exist still because of smoke detectors and theyre always low on charge even right out of the package. Same with C and D batteries. AAA and AA still have their uses though.
Obsolete but still in use, hmmmmmm
The main reason that they’re nearly impossible to obsolete is that AA, etc. are just shapes (and voltages).
and are only 1.2V.also1.2V, but are rechargeable; they last longer overall, but are much more expensive and have much worse self-drain while not in useCarbon-Zinc batteries are basically impossible to find, yes. They were pretty much entirely superseded by Zinc Chloride batteries, which are fairly easy to find. They’re often marketed with the phrase “heavy duty” though they’re lower in capacity to alkalines.
They’re about 1.6V open-circuit, and maintain 1.5V under light load for a large portion of their discharge cycle. They maintain 1.5V much longer than alkaline.
They’re terribly expensive for regular use compared to pretty much any other option though.
My mistake, fixed.
Always the possibility we invent a way to make them smaller, more compact, or higher voltage
None of those things improve the insertable battery. Their size and voltage are what makes them useful. A smaller, higher voltage AA battery is an entirely useless AA battery.