Cramming a lithium-ion cell, a tiny internal circuit board, a voltage step-down converter, and a live USB-C port right inside a tiny 1.5V cylinder is a safety and manufacturing nightmare.
�Unlike a phone or a laptop where there is dedicated space for a battery management system (BMS) with temperature sensors and thermal management, these tiny cells leave almost zero margin for error. If the internal protection circuit fails, or if a cheap component shorts out while someone is plugging it into a fast charger, you've essentially built a micro-incendiary device disguised as a household consumable.
�Lithium-ion chemistry hates being squeezed into tight, uncontrolled spaces without proper thermal management. Handing a consumer a literal loose cylinder with a direct charging port—expecting them to toss it in a drawer, a backpack, or a device without knowing its cycle history—is just asking for thermal runaway.
It's not just a half-measure; it's a structural safety hazard waiting to bite people.
I bought some off of Temu and they didn't last a couple of hours in a smoke alarm. I was able to get a partial refund and keep the batteries. I put them in our electric lift chairs as backup in case we get stuck up when our electric goes out. Tried it once as a test and they kinda worked but I also had a regular 9 volt in the box too. I'll try them again sometime.
Verbatim plans to launch lithium-ion AA and AAA rechargeable batteries, along with a 9V battery. All models can be charged via USB-C, eliminating the need for a dedicated battery charger. Thanks to voltage conversion, the rechargeable batteries can replace standard disposable batteries.
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