Lead acid batteries have problems like heavy weight, short life span, etc.
If this is well understood, the Cost-of-Ownership of Lithium batteries are far better than being perceived.
Lithium tech. is far better off, for being : 50% lighter
200% Runtime @0.2C discharge
400% usable capacity @1C discharge
saving Many Hours of charging time
4X Cycle-life
Long Shelf Life (over winter)
Maintenance Free
Non-hazardous & Eco-friendly