See if it is lithium iron phosphate or ternary lithium ion. Lithium iron phosphate 12.8V40AH costs about 1,200 yuan. The price of 10.8V40AH ternary lithium-ion battery is 700 yuan. The voltage of lithium iron battery is 2V higher than that of ternary battery. The lithium iron battery has 4 strings and the ternary battery has 3 strings.
Many factors affect the price of lithium batteries, mainly the capacity of the battery, its age and brand, etc.
It has nothing to do with see with the tension. If you want to make an electric car, you can't use reconditioned batteries
The minimum lithium battery must be 10AH, which costs more than 300 coins
You said that the price is probably that of a lead acid battery.
Even reconditioned lithium batteries are not that cheap
If you have less money, use lead acid batteries, which cost aroundron 100 yuan. Don't buy too expensive