Not a specific recommendation so much as a tip to get the most out of whatever you end up choosing:
No battery will last forever, but one important thing you can do to extend the shelf life of rarely used rechargeable electronics is to make sure they aren’t always plugged in. Lithium batteries in particular degrade much faster if they’re left continually charging for weeks or months at a time. I’ve got my battery powered emergency lights plugged in to a smart outlet which my home automation system turns on for one hour every 14 days. That’s enough to keep the charge between 99% and 100%, and I’m hopeful that it will help maximize the useful life of the device. If you want a standalone solution you could try one of these, although I’ve never personally used one so I can’t vouch for quality.
Not a specific recommendation so much as a tip to get the most out of whatever you end up choosing:
No battery will last forever, but one important thing you can do to extend the shelf life of rarely used rechargeable electronics is to make sure they aren’t always plugged in. Lithium batteries in particular degrade much faster if they’re left continually charging for weeks or months at a time. I’ve got my battery powered emergency lights plugged in to a smart outlet which my home automation system turns on for one hour every 14 days. That’s enough to keep the charge between 99% and 100%, and I’m hopeful that it will help maximize the useful life of the device. If you want a standalone solution you could try one of these, although I’ve never personally used one so I can’t vouch for quality.