Hi, I assumed 3.2V to work out the Wh so think I have 160 WH available - or at 12v output I got ~6 hrs use at approx 2A draw....
I got mine from:
https://www.laptopplus.com.au/Univer...px?prodid=1218
Notes:
I did not get a charger in the box (supplier has agreed to send one).
There are other suppliers of similar products.
This is not weatherproof!
It is small/light and powerful enough for my use with a portable setup - including running a cooled CCD, NUC, focuser and my iOptron 40EC.