Something to consider about batteries is that the new lightweight LiFEPO4 like the Ballistic cannot be charged with an anti-sulphating pulse charger like my CTEK 3300. (Pulse mode is part of program and can’t be turned off). Older standard type chargers OK, and newer chargers where pulse mode can be turned off would be OK………PULSE MODE will kill a Lithium battery.
Price and weight are the other factors.
A basic Sealed Lead Acid 7ah battery is less than 20 bucks and weighs 4.8 pounds.
An equivalent Ballistic LiFEPO4 8ah battery is about 100 bucks and weighs 1 pound.
Andy’s NiMH 5ah is right in the middle of that at 2 pounds and 65 bucks.