I have an old school sealed lead acid that I have used for years replaced the battery in it twice over the years and still use it around the shop. Just have to remember to plug it in every few months to top it off. About 6 or 7 years ago I bought one of small Lithium units after a friend swore by his and have carried it in my truck or B camper ever since. I top of the charge once a year or after I use it and it works great I have started large V8s and our Honda CRV when the OEM battery died unexpected and left my wife stranded. I showed up with the B expecting to get the jumpers out but remembered the little lithium in the back. I hooked it up and got her started in nothing flat. Followed her to AutoZone and had a new battery installed.
I also use it as a backup USB charger when camping.