My old (smaller) lithium jump-pack that I have had for around 8 or 9 years had given up, and will no longer hold a charge for any length of time...........would also not boost a small 4-cylinder car the last time I tried to use it for that...............so away it goes!
In its place I've ordered the Noco GBX-45 (which is the largest one they offer that has removable jumper-leads. This was an important feature to me)
Size comparison to an old iphone 6S-plus (same size as my 12-Pro max)
Weight with a full charge of electrons
1lb-5oz
The reason I wanted one with removable jumper-leads, is because I also ordered the "Hard-Wired" jumper-lead Connector.