Battery primers.
Welcome to Battery University
Frequently Asked Questions about Rechargeable Batteries
Have to consider life of battery in the cost calculations. Of course PbSO4 is less expensive up front. Most lead acids only have a life of 300-700 full recharges. Lithium can have 1000- 3000 recharges. But lithium cells need a BMS and more a specialized charging unit which can drive the cost even higher.
JJ