Yes, Sir. Li battery. We only ran it down to 81% (indicated) SOC over a 2 day period one weekend. I am still fascinated by my wife's Samsung Galaxy S5 phone. It's over 4 years old, and she routinely runs it down to 0% (indicated) and it shuts off, then recharges it overnight and DEEP cycles it again, (over and over and over again). Does 0% mean 0%, or is it really maybe 40%, 30%, SOC? I don't know how it takes such abuse. We have a Campbell-Hausfeld 12 volt LA jump starter / power supply / 75 watt 120v inverter that is well over 10 years old, and it still works reasonably well powering radios, a laptop, and my computerized telescope all night. Maybe the charger for that is "smart" and "refreshes" the battery? Our DeWalt 20v MAX 2 AH and 5 AH Li tool batteries hold a charge for a long time, but do not like to charge when they are cold. I'm getting quite an education on batteries!
My brother-in-law bought AGM (type 2?) Are they safer than lithium in his basement? His basement has some venting.