Personal protective equipment
Every person who touches a forklift battery — watering it, charging it, inspecting it, or moving it — needs the same basic kit. This is not optional gear for special jobs. It is the everyday uniform for battery work, and the one time someone skips it is usually the time something splashes.
- Acid-resistant gloves. Rubber or PVC gloves that cover the wrist. Leather work gloves are not acid-resistant and will soak through.
- Safety goggles or a face shield. Goggles at a minimum; a face shield as well when watering, equalizing, or working over an open battery. Acid in the eyes is the injury that turns a bad day into a permanent one.
- Acid-resistant apron. A rubber or PVC apron protects the torso and legs from splashes that would eat through a work shirt in minutes.
- Steel-toed boots. Batteries weigh hundreds to thousands of pounds. A dropped battery or a slipped lifting beam does not care that you were only watering.
Keep the PPE at the charging station, not in a locker across the building. If it is not within arm's reach, people will skip it. Inspect gloves and aprons regularly — cracked rubber and worn -through spots do not protect anyone.
Sulfuric acid: spills and splashes
The electrolyte in a flooded lead-acid battery is sulfuric acid diluted with water. It burns skin, destroys clothing, damages eyes, and eats concrete. Most acid exposure in warehouses happens during watering and equalizing, when the battery is open and someone is leaning over it — which is exactly why the PPE above matters.
For a spill on the floor, the standard response is to neutralize it with baking soda (sodium bicarbonate). Keep a supply at the charging station along with a scoop and a brush. Sprinkle baking soda over the spill until it stops fizzing, then sweep up the residue and dispose of it according to your facility's hazardous waste procedures. Never wash a large acid spill down a drain, and never use water alone on a concentrated spill — neutralize first.
Every charging area needs an eyewash station within a short walk, and everyone who works near batteries should know where it is before they need it. Check the eyewash weekly: it should run clean water on demand, not sit dry or clogged. If your facility handles batteries daily, a plumbed eyewash station beats a bottle every time.
Hydrogen gas during charging
Lead-acid batteries release hydrogen gas while charging, most of all during the final stage and during equalizing charges. Hydrogen is colorless, odorless, and flammable at low concentrations in air. A charging room with poor ventilation can build up enough gas for a spark to ignite it — and sparks are easy to come by around electrical equipment.
- Ventilate the charging area. Charging rooms need airflow that moves hydrogen out before it accumulates. Do not charge batteries in a closed room with no ventilation.
- No flames, smoking, or sparking tools near charging batteries. This includes grinding, welding, and cutting anywhere near the charging station. Post the rule and enforce it.
- Keep vent caps on and clear. Battery vent caps let gas escape in a controlled way. A blocked or missing cap traps gas inside the cell, which can build pressure.
- Connect and disconnect the charger correctly. Always turn the charger off before connecting or disconnecting the battery. Pulling a live connector can draw an arc — a spark right where hydrogen is venting.
- Watch for heat. A battery that is unusually hot during charging is overcharging or has a failing cell. Stop the charge and get it checked.
Lithium-ion batteries do not release hydrogen during normal charging, which is one of their safety advantages — but they have their own risks, including thermal runaway if damaged or charged with the wrong equipment. Follow the manufacturer's charging and storage instructions for any lithium pack.
Safe handling and lifting
A forklift battery is one of the heaviest single objects in a warehouse. A 48-volt pack can weigh 3,000 pounds or more. Treating it like any other load is how people get crushed.
- Never lift a battery by its cables. Cables and connectors are not lifting points. They can snap, short against the steel tray, or pull loose and drop the battery.
- Use rated lifting equipment. A crane, hoist, or battery extractor rated for the battery's weight, with lifting beams or hooks that fit the battery's lifting eyes. Check the equipment's rating before every lift, not just once a year.
- Keep hands and feet clear. Never put a hand under a suspended battery or between the battery and the truck frame while it is being set in place.
- Move batteries on a level surface. A battery on a cart or roller bed can tip if the floor is uneven or the cart hits a dock plate at speed.
- Secure the battery in the truck. A loose battery shifts during operation, which damages cables, cracks the case, and changes the truck's balance. Lock it down every time.
What to do after an incident
Even with good habits, incidents happen. What matters is that everyone knows the response before it is needed — not after.
- Acid on skin: flush with plenty of clean water for at least 15 minutes. Remove contaminated clothing while flushing. Seek medical attention if the burn is more than minor redness.
- Acid in the eyes: use the eyewash station immediately and keep flushing for at least 15 minutes, holding the eyelids open. Get medical attention right away, even if the pain fades — eye damage is not always obvious at first.
- Acid swallowed: do not induce vomiting. Give water if the person is conscious and able to swallow, and get emergency medical help immediately.
- Spill cleanup: put on PPE, contain the spill, neutralize with baking soda, sweep up the residue, and dispose of it as hazardous waste. Ventilate the area and report the spill through your facility's incident process.
- Fire near a charging battery: cut power to the charger if it is safe to do so, evacuate the area, and call emergency services. Do not use water on an electrical fire — use the extinguisher rated for it.
After any incident, write it down: what happened, what was done, and what changes. Incident reports are how a facility learns — the next person benefits from the one who went first. For the maintenance habits that prevent most of these incidents in the first place, see our pages on battery maintenance and chargers.