Signs your battery is done
- Runtime keeps shrinking. The truck used to cover a full shift and now dies at lunch. Watering and equalizing no longer bring it back.
- It will not hold a charge. The charger finishes, the meter reads full, and the battery drops fast under load.
- Physical damage. Cracked cases, swollen cells, heavy corrosion on terminals, or leaking electrolyte.
- It is past its life. A well-maintained lead-acid battery lasts around 1,500 charge cycles, roughly five years in single-shift use. Multi-shift fleets get there faster.
Not sure it is the battery? Read how long a forklift battery lasts first — a charger or cable problem often looks like a dead battery.
Replacement by voltage
| Voltage | Typical trucks | Replacement notes |
|---|---|---|
| 24V | Electric pallet jacks, walkies, small stackers | Compact batteries, shorter runtimes, quickest to source. |
| 36V | Mid-size counterbalance forklifts, order pickers, narrow-aisle trucks | The workhorse range for indoor distribution. |
| 48V | Mid-size to large counterbalance forklifts | Most common replacement we quote. Widest dealer stock. |
| 80V | Heavy-duty and high-capacity forklifts, port equipment | Larger, heavier, longer lead times — order early. |
What to have ready for a replacement quote
The dealer needs four things to quote accurately: truck make and model, battery voltage, compartment dimensions (length × width × height, in inches), and connector type. Amp-hour rating helps if you know it — it is printed on the battery data plate. Photos of the data plate save a round of back-and-forth.
Download our free forklift battery sizing checklist before you measure — it walks through every field, including how to measure the compartment.
Replace or repair?
Repair wins when the problem is isolated — a bad cell, a cable, a connector, or sulfation that has not gone too far. Replacement wins when the whole pack is tired: short runtime across all cells, age past its expected life, or damage to the case. A dealer who does both will tell you which one pencils out. Our battery repair page covers what reconditioning can and cannot fix.
Replacement questions, answered
How do I know my battery needs replacing instead of repair?
Short runtime that no longer covers a shift, cells that will not hold a charge after watering and equalizing, cracked cases, or a battery that has been in service well past its expected life usually point to replacement. A dealer can load-test the battery and tell you honestly whether repair is worth it — many mid-shift failures turn out to be a charger, cable, or single-cell problem instead.
What voltage is my forklift battery?
Check the data plate on the battery or the truck — most electric forklifts run 24V, 36V, 48V, or 80V systems. The replacement must match the truck's voltage exactly. If the plate is missing or unreadable, send the truck make and model in your quote request and the dealer will confirm.
Can I replace a lead-acid battery with lithium?
Often, yes — that is a lithium conversion, and it usually means a new charger too. See our lithium conversion cost page for what drives the price. If you just need the truck running again fast, a like-for-like lead-acid replacement is usually the quickest path.
Will the dealer take my old battery away?
In most cases, yes. Dealers typically handle removal of the old battery when they deliver a replacement, and spent lead-acid batteries go to recycling. Ask about core credit when the dealer quotes you — cores have value.
How long does a replacement take once I request a quote?
Dealers respond the same business day in most markets. Delivery time depends on stock and your voltage and size — common 48V sizes are often available quickly, while less common voltages or capacities may need to be ordered. Put your timeline in the quote form.