we provide various information about basic knowledge about batteries and how to use/handle them to help you manage your batteries more efficiently. For any questions about the provided information below, please contact us at anytime.
If treated with care and taking the proper precautions, lead acid batteries can be handled safely with minimum risk.
However, lead acid batteries contain sulfuric acid which is both poisonous and corrosive.
This makes them potentially hazardous and can cause serious injury when standard handling procedures and safety measures are not respected.
No sparks,
flames or Smoking.
Shield eyes.
Keep
children away.
Corrosive hazard.
Explosion hazard.
Read instruction
manual carefully.
Flush eyes
immediately with water.
Get medical help fast.
Turn off engine,
all accessories and
key-off.
Remove the negative
cable (Ground) first,
and then positive
cable from the old
battery.
Remove the
hold-down bracket
or clamp.
Replace with new
battery and fix it with hole-down bracket or
clamp.
Connect cables in
reverse order from
positive to negative
if clamp or cables are corroded,
remove corroded material and
grease it
If the battery is below 12.4V or fails to pass the load test, battery must be recharged as soon as possible to prevent lead sulfation. During charge, if the battery sprays electrolyte through the vent holes or gets hot (over 52℃), the charge must be stopped for a time to allow the battery to cool.
Measure the OCV(Open Circuit Voltage)of a discharged battery.
Set the OCV and capacity of the battery with moderate electric current and time stated below table.
Connect the battery to constant current charger and start charging.
When the charging time is completed, separates battery from the charger.
State of Charge |
Sp.Gr | OCV | ~30Ah | ~40Ah | ~50Ah | ~60Ah | ~70Ah | ~80Ah | ~90Ah | ~100Ah | ~110Ah |
---|---|---|---|---|---|---|---|---|---|---|---|
1.5A | 2.0A | 2.5A | 3.0A | 3.5A | 4.0A | 4.5A | 5.0A | 5.5A | |||
100% | 1.265 | 12.7 | - | ||||||||
75% | 1.225 | 12.4 | 6Hrs | ||||||||
50% | 1.190 | 12.2 | 12Hrs | ||||||||
25% | 1.155 | 12.0 | 18Hrs | ||||||||
Discharge | 1.120 | 11.9 | 24Hrs |
Connect the discharged battery to constant voltage charger.
Charge for 24 hours as following voltage upon battery type.
- 12V MF Battery: 16V
- 12V AGM Battery: 14.4V
When the charging time is completed, separates battery from the charger.
Good Condition
Charging Necessary
Replace Battery
Approximate State of Charge | OCV |
---|---|
100 % | 12.75 |
75 % | 12.40 |
50 % | 12.20 |
25 % | 12.00 |
Discharged | 11.90 |
Minimum Voltage | Temperature |
---|---|
9.6V | 21 ℃ above |
9.4V | 10 ℃ |
9.1V | -1 ℃ |
8.9V | -7 ℃ |
8.5V | -18 ℃ |
For reference only