Electric Reach Truck (Used Japanese) Not Fully Charging – Causes & Solutions

Used Japanese electric reach trucks are popular for their durability and cost-effectiveness. However, a common issue is the battery not fully charging, which significantly affects performance.

This article explains the main causes and how to fix them effectively.

Signs of Incomplete Charging

Battery charges quickly but drains fast during use
Long charging time but voltage never reaches full level
Weak lifting power after charging
Incorrect charging indicator signals

Main Causes

1. Battery Sulfation or Damaged Cells (Most Common)

Long-term use leads to sulfation
One or more cells may fail
Reduced battery capacity

👉 Result:

Cannot reach full charge
Or shows “full” but drains quickly

2. Faulty or Incorrect Charger

Using the wrong voltage charger (24V, 36V, 48V mismatch)
Charger malfunction
Early auto cut-off

3. Unstable or Low Input Power

Low voltage supply
Thin or long cables causing voltage drop

4. Low Distilled Water Level

Lead-acid batteries require regular water refill
Low water reduces charging efficiency

5. Loose or Corroded Connectors

Poor electrical contact
Inconsistent charging current

6. Control Board Issues (Rare)

Battery management system malfunction
Incorrect charge detection

How to Check & Fix

Check total battery voltage
Measure each cell voltage
Refill distilled water if needed
Test with another charger
Check power source and cables

When to Replace the Battery?

Cannot reach full charge after inspection
Battery drains quickly
Battery age over 3–5 years
Multiple damaged cells

👉 Recommendation: Replace the whole battery if many cells are faulty.

Conclusion

The issue of electric reach truck not fully charging is mainly caused by:

Battery degradation
Charger problems
Power supply instability

Proper diagnosis helps save repair costs and extend equipment lifespan.