I have an electrical bicycle that I rarely use, and I'm thinking about turning it into a project.
The electrical bicycle has a 36V Lithium-Ion battery. When it's fully charged, it produces around 42V (36V is measured when it's fully discharged). It's completely okay, but I want to test out something different.
I figured out that for the price of a new 15Ah 36V Lithium-Ion battery I can get 3 12V 41Ah (99RC) lead-acid batteries. If put in series, it'll produce 36V for 41Ah. That's more than twice the energy for the same price!
Except for the lead acid batteries having a slightly lower voltage (36V < 42V) than the Lithium-Ion counterparts, shorted lifetime and disregarding weight and size, what major disadvantages will the lead-acid batteries have?