Lead-Acid vs Lithium for a Georgetown Cart: The Honest Ten-Year Math

September 15, 2026

The battery question arrives on about one call in three around Georgetown and Sun City Texas, usually from someone facing their second pack replacement. It used to have an easy answer: lead-acid was much cheaper up front and roughly broke even over ten years, so it came down to whether you minded watering batteries.

Lead-acid prices have moved, and that answer has changed. Here is the current version, with the numbers we actually publish.

What each one costs

Read the last row carefully, because it is the row that has changed. At today’s lead-acid prices, the two chemistries cost about the same per year of service. The old “lead-acid is simply cheaper” argument no longer holds.

The ten-year picture

Take a typical Sun City Texas cart, used most days for neighbourhood driving, kept in a garage that reaches 110 degrees in August.

Lead-acid path. A pack now at roughly $1,500. In this climate, with good watering, it reaches five years. Another at year five, another around year ten. That is roughly $4,500 in packs over ten years, plus the watering, plus the sag on hills as each pack ages, plus the two occasions when it dies unexpectedly and the cart is out of action.

Lithium path. One conversion at, say, $2,800 for a capacity that covers real daily use. Ten years later it is quite possibly still working, because seven to ten is the expectation, not the ceiling. That is roughly $2,800 over ten years with nothing to water.

The gap is around $1,700 in lithium’s favour on those assumptions, and it widens if the lead-acid packs get neglected. That is a genuine difference, and it is the reason we stopped telling people lithium was a luxury.

Where lead-acid still wins

Three situations, and they are real ones:

The upfront number matters. $1,200 is an easier cheque than $2,800, and “cheaper over ten years” does not help someone who needs the cart working this week. That is a legitimate constraint and not a failure of arithmetic.

The cart is not worth it. A $3,000 pack in a twenty-year-old cart with tired brakes, a worn motor, and cracked seats is money going into a body that will not outlive it. On carts like that we will say plainly that the budget lead-acid pack is the right call.

You might sell it. Cart buyers do not reliably pay a premium for a recent lithium conversion, so the money may not come back out.

Where lithium wins hardest, specifically here

Heat. Central Texas is the argument. A flooded lead-acid battery loses electrolyte to evaporation in a hot garage, and every time the plates are exposed, capacity is lost permanently. There is no equivalent failure mode in lithium. If you have ever come back from a summer trip to a dead pack, this is the mechanism, and the sat all summer page covers it in detail.

The watering chore. Every two to four weeks in summer, distilled water, after charging, filled to just over the plates. Most owners do not do it consistently, and the pack pays for it. Lithium deletes the chore and therefore deletes the failure mode.

Hills. Lead-acid sags under load, and sags more as it ages. A lithium pack holds close to full voltage until it is nearly empty, so the cart climbs the same at 30 percent charge as at 90. On the rolling ground around Georgetown and through Sun City Texas, that is something you feel every day, not a spec-sheet difference. The weak on hills page explains the physics.

The summer sit. A lithium pack self-discharges far more slowly, which matters for owners who travel out of the Texas heat for part of the year. Store it at a partial state of charge rather than full or empty, and use the disconnect if the cart has one.

The question to ask before either

Is the pack actually the problem?

It is common for a cart owner to be quoted a full set of batteries when the fault was a charge port at $100–$300, a charger at $300–$800, or a solenoid at $100–$250. Range loss also comes from a dragging brake and from tires ten PSI low, neither of which costs anything like a pack.

That is what the load test is for: six individual results rather than one pack voltage, plus a charger output test and a roll test. It is the difference between a diagnosis and a guess, and the will not charge and range dropping pages walk through the checks you can do yourself first.

The short version

At current prices lithium usually wins the ten-year math in Central Texas, and it wins the day-to-day experience by more than the numbers suggest. Lead-acid remains the right answer when the upfront budget is the binding constraint, when the cart itself is near the end of its life, or when you may sell it soon.

Whichever you choose, the habits decide how long it lasts. The battery cost calculator prices both against your own cart, and the pricing page publishes every number used on this page.