DEWALT DCB090 12V/20V Max USB Power Source (BATTERY NOT INCLUDED) https://www.amazon.com/dp/B00EYSUK7W/ref=cm_sw_r_cp_apa_i_QD5oCbJKEZXP2
For some reason the official version is not available on Amazon, but there are plenty of off-brands that look similar. You can also pick one up at your local home depot (not an advertiser).
This is good. I have one. I can get 4 charges on 1 dewalt battery with my brand new galaxy s22
If you have any power tools or something similar with high capacity batteries, you can probably get an adapter for your needs. For example for our DeWalt batteries I bought this USB adapter off Amazon which works perfectly for many festival needs.
Something like this; there's all kinds of options if you search for USB adapters
I use mostly Milwaukee.
Dewalt has a fairly pricey one, but still worth it for hurricane prep in my opinion:
DEWALT 12V/20V MAX USB Charger, Tool Only (DCB090) https://www.amazon.com/dp/B00EYSUK7W/ref=cm_sw_r_cp_api_i_BkTpFbP1836H0
I haven’t seen one for black and decker.
Corollary to that...you can use your power tool batteries to charge devices, too.
I'm late to the party, but I have DeWalt heater jacket that has a little clip-on connector that attaches to the battery. It provides 20V to the jacket, via a small barrel plug and has a USB port so you can charge your phone, providing 5V. It looks very similar to this: https://www.amazon.com/DEWALT-DCB090-12V-Power-Source/dp/B00EYSUK7W
Legit used this through a black out listen to music.
Adding on to this is you already have alot of drill battery's around you can find a portable battery pack adapter that goes on your drill batteries I have one for DeWalt and Milwaukee
DEWALT DCB090 12V/20V Max USB Power Source (BATTERY NOT INCLUDED) https://www.amazon.com/dp/B00EYSUK7W/ref=cm_sw_r_cp_apa_i_59UCCb1YY87QQ
Milwaukee 48591201 M12 Charger and Portable Power Source https://www.amazon.com/dp/B07849X7BF/ref=cm_sw_r_cp_apa_i_K-UCCbBNEPZCT
They do indeed make a USB adapter: https://www.amazon.ca/dp/B00EYSUK7W/ref=cm_sw_r_cp_apa_fabc_NZCUFbMJMTQGB
You get one if you use their powered insulated jackets: https://www.amazon.ca/dp/B07HDMWP5C/ref=cm_sw_r_cp_apa_fabc_K0CUFb82G3XY9
I have a 9ah Flexvolt and one of these adaptors it makes an okay USB phone charger.