Mmm.. between 50% and 75% depending on discharge rate, quality, and chemistry, but yes, a lot less than 100Ah.
USB Adapter Compatible with Dewalt 10.8V/14.4V/18V Lithium Ion Battery Packs YEX-BUR Cordless USB Charger Power Source Portable Converter Charging Adapter for USB Mobile Devices https://amzn.eu/d/3dSlfqvHave you got a link to it?
Have you got a link to it?
This is the problem which is why I've bought the unit mentioned in the OP with 240 option, still not received it yet so don't know how well it will perform, been advised in this thread that it won't be as good as I hoped but it might have it's uses.The most awkward thing about it is when the batteries run out how are you charging them.
Do you have a link to something suitable? T.I.AWhy to use an inverter, a dc-dc converter would have much higher efficiency.
This is the problem which is why I've bought the unit mentioned in the OP with 240 option, still not received it yet so don't know how well it will perform, been advised in this thread that it won't be as good as I hoped but it might have it's uses.
You need to convert everything to 'power' = Watts = Volts x Amps, then see if the device gives you what you want/need. A lead acid vehicle battery is typically 75 to 100Ah. So at 12v a 100Ah battery will give you 1,200wh - that will run a 60w mains load for a theoretical 20 hours; inefficiencies will reduce that to nearer 15 probably.
Taking Stew's point, a typical power bank is around 20Ah, but that's only at 5v, so only give 100wh.
Convert everything to power, then compare
Well the unit just arrived (from China) hadn't realised that when I bought it, now to have a play with it.
Well already I've found a flaw in my cunning plan, the DeWalt charger draws over the 200w stated the inverter will handle, in the words of the great Homer, D'oh lmaoIt will be an interesting thing to see what it does and doesnt run once plugged in.
I'll say something, in the words of Nelson from the Simpsons "Ha Ha"Lol, thanks