HOW TO CHECK THE CAPACITY OF A LEAD-ACID BATTERY FOR A FORKLIFT

To check the capacity of a lead-acid battery (lead-acid accumulator) in a forklift, you can follow these methods:

🔋 1. Voltage Test

Tool: Multimeter
Steps:

• Set the multimeter to DC voltage mode.

• Measure the voltage between the positive (+) and negative (–) terminals of the battery.
  Reference for a 12V battery:

Note: Voltage gives a temporary reflection of capacity. If the battery was just charged or used, wait 2–3 hours for more accurate results.

🔋 2. Specific Gravity Test (Hydrometer Test)

Tool: Hydrometer
Steps:

• Open the cap of each battery cell (for flooded batteries, not sealed types).

• Draw a small amount of electrolyte and measure specific gravity.
  Reference values:

Each cell should show similar values. A major deviation could indicate a faulty cell.

🔋 3. Load Test

Tool: Specialized battery load tester
Steps:

• Connect the device to the battery.

• Apply load and monitor voltage drop.
  Result:
  If voltage drops too fast or too low, the battery might be weak or damaged.

🔋 4. Using Specialized Equipment

Some brands provide advanced diagnostic tools (e.g., Midtronics, BDS, or from battery manufacturers) that show:

• Remaining capacity (%)

• Cold Cranking Amps (CCA)

• Internal resistance

• Cell condition

What kind of battery are you testing? Flooded or sealed? New or used? Let me know for more specific guidance.