Are lead-acid batteries really cheaper than lithium batteries?

Taking the common 48V 20Ah specification as an example, lithium batteries (mainly lithium iron phosphate) cost approximately two to four times more than lead-acid batteries. If only the initial purchase price is considered, lead-acid batteries seem superior.

However, if lifespan is taken into account, the conclusion changes.

Lead-acid batteries generally need replacement every one to two years, and with frequent use, noticeable degradation occurs within six months, requiring approximately three replacements within five years.

Lithium batteries, on the other hand, can last five to eight years or even longer, with lithium iron phosphate batteries boasting a cycle life of 1500 to 3000 cycles, essentially eliminating the need for replacement after five years.

While lead-acid batteries appear cheaper, considering the time, shipping costs, and inconvenience of repeated replacements, lithium batteries actually offer better overall value.

Furthermore, lead-acid batteries experience a range reduction of over 30% in the latter half of their lifespan, while lithium batteries show a reduction of less than 10% over five years.