

Basically amps is capped at 5 ampere, so it’s watts / 5. So for 20V you need 100 watt. USB Power Delivery specification revision 2.0 does up to 240W with 48V which is pretty awesome.
I’d love a 20V battery for power tools that just has a USB3 plug instead of special chargers.
Ironically crashing the economy is one of the best things you can do to slow down climate change