OCOOPA 10,000mAh Rechargeable Hand Warmer
I don’t know about you guys, but here in OKC we just got through a couple days of freezing rain. After stupidly using my bare hands to move a bunch of huge tree-cicles off the road this morning so people could get by, I found myself wishing I’d had a good hand warmer.
In the short amount of research I’ve been able to do, this one by OCOOPA looks to be a very solid choice. It holds up to 10,000mAh of juice, apparently enough to run the thing for around 8–15 hours, depending on which setting you use: low (~95°F), medium (~116°F), or high (~130°F, which is honestly hotter than most people need). And yes, it heats on both sides.
The device also doubles as a handy (get it?) battery bank, with three ports — USB-C, USB-A, and Micro-USB — for charging other things you have around, like your phone. Obviously, doing that will shorten the life of the hand-warming feature until you recharge it again.
All of this comes in a TV remote-sized package with rubberized sides and an ergonomic shape for easy holding.
You can get the 10,000mAh version for $33 on Amazon. They also have a version of it with Power Delivery for $37, which can be fully recharged in half the time.