First-Gen Absolute Gem. Period.

To the OP (and all others reading), invest in one of these:

HALO Bolt Portable Car Jump Starter 57720 MWH Car Battery Jump Starter with 2 USB Ports To Charge Devices, Portable Car Charger - Black Graphite, 123225

https://www.amazon.com/gp/product/B07B2SSK8B/ref=ox_sc_saved_title_9?smid=A3K0E1SGLNAP3C&psc=1
or similar. I've had one for over 5 years now, and it has been one of the best things I've ever purchased for my vehicle. Holds a charge forever, even through the winter months. Probably used it 20+ times for myself and others, and it has never failed to work.

 

I intend to get something like this now, that is for sure.
When you say you used it 20+ times for yourself and others, did you mean for jump starts? Or for a combo of that and phone charging?

 

A conference with Saint Peter

 

I use this strictly for jumps, have a smaller unit that I use for charging devices: https://www.amazon.com/gp/product/B01G1XH46M/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
To clarify, those 20+ jumps weren't from one charge of the device - I've charged it maybe four times since I've owned it.