FG120-12 maintenance free 120ah deep cycle battery 12v

VRLA Battery 12V 120AH | Dimension: 331x174x214x219mm

SKU: FG120-12 Category:

GRANKIA FG120-12 maintenance free 120ah deep cycle battery 12v is designed to be deeply discharged and recharged hundreds of times.

GRANKIA AGMs use more lead, heavier plates with high-density paste and other proprietary materials. It can enable them to deliver more reserve power and maintained capacity over many life cycles.

Due to its outstanding performance, the maintenance free 120ah deep cycle battery is a favorite in a wide variety of applications. Maintenance-free and leak-proof, the battery is ideal for standby projects that require minimal monitoring.

FG120-12 maintenance free 120ah deep cycle battery 12v

FG120-12 maintenance free 120ah deep cycle battery 12v

120AH Deep Cycle Battery Features

1.) AGM technology

AGM stands for Absorbent Glass Mat. In these batteries the electrolyte is absorbed into a glass-fibre mat between the plates by capillary action.

2.) Low self-discharge

Storing batteries at lower temperatures thus reduces the rate of self-discharge and preserves the initial energy stored in the battery.

3.) VRLA technology

VRLA stands for Valve Regulated Lead Acid, which means that the batteries are sealed. Gas will escape through the safety valves only in case of overcharging or cell failure.

4.) Puncture Resistant Case

Each of the 6 cells within this SLA battery is wrapped in a puncture resistant polyethylene envelope, so even if the outercase is pierced no leakage will occur.

5.) Maintenance-Free Design

Minimises technician time spent at site and on battery related callouts.

Lead Acid Battery Applications

  • Uninterrupted power supply(UPS)
  • Automotive and traction applications
  • Lighting equipment, fire alarms and security systems
  • Communication and telecom system
  • Solar energy system
  • High current drain applications
  • Fire alarms and security systems
  • Portable VTR/TV, tape recorders, radios, etc.
  • Various power toys and recreational equipment
  • Emergency power supplies in power generation plants and substations
  • Golf Cart

VRLA Battery Details

sealed lead acid battery 12v copper terminalReliable and high performance lead acid battery

AGM lead acid battery in series or in parallel connection

Battery Storage Characteristics

Lead Acid Battery Discharge Characteristics Lead Acid Battery Charging Characteristics
Lead acid battery effect of temperature on capacity Lead acid battery self discharge characteristics
Lead acid battery relationship for open circuit voltage and residual capacity Lead acid battery the relationship for charging voltage and temperature
Lead acid battery floating life on temperature Lead acid battery cycle life on DOD

Deep Cycle Battery FAQ

  1. What does deep cycle mean in batteries?

    A deep cycle battery is a lead battery designed to provide sustained power over a long period and run reliably until it is 80% discharged or more, at which point it needs to be recharged.

  2. How long should a deep cycle battery last?

    Most deep cycle batteries can last up to six years with proper care and charging. It’s up to you that your battery isn’t being damaged by your charging routine.

  3. Are deep cycle batteries worth it?

    For the uninitiated, a deep cycle battery is essential for providing power over a sustained period of time.


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    Nominal Voltage 12V(6 cells per unit)
    Design Floating Life @25℃ 10 Years
    Nominal Capacity @25℃(20 hour rate@6.00A,10.50V) 120Ah
    Capacity @25℃ 10 hour rate (11.13A,10.8V) 111.3Ah
      5 hour rate (19.6A,10.5V) 98.0Ah
    1 hour rate (71.0A,9.6V) 71.0Ah
    Internal Resistance Full Charged Battery@25℃ ≤4.2mΩ
    Ambient Temperature Discharge -20℃~50℃
    Charge -20℃~50℃
    Storage -20℃~50℃
    Max. Discharge Current@25℃ 1100A(5s)
    Capacity affected by Temperature

    (10 hr Capacity )

    40℃ 102%
    25℃ 100%
    0℃ 85%
    -15℃ 65%
    Self-Discharge@25℃ per Month 3%
    Charge (Constant Voltage) @25℃ Standby Use Initial Charging Current Less than 24A

    Voltage 13.6-13.8V

    Cycle Use Initial Charging Current Less than 24A

    Voltage 14.4-14.9V


    Discharge Constant Current per Cell (Amperes at 25°C)

    F.V/Time 15min 30min 45min 1h 2h 3h 5h 6h 8h 10h 20h
    1.60V 200.9 118.3 89.6 71.0 41.7 30.7 20.7 18.0 14.1 11.69 6.18
    1.67V 189.8 112.1 86.2 68.9 40.4 29.7 20.4 17.7 14.0 11.47 6.12
    1.70V 178.2 108.9 83.0 66.2 39.3 28.9 19.9 17.4 13.8 11.35 6.06
    1.75V 167.0 104.1 79.4 63.6 38.3 28.3 19.6 17.0 13.6 11.24 6.00
    1.80V 156.6 100.3 76.5 61.3 36.8 27.4 19.1 16.7 13.4 11.13 5.80


    Discharge Constant Powerper Cell (Watts at25°C)

    F.V/Time 15min 30min 45min 1h 2h 3h 5h 6h 8h 10h 20h
    1.60V 384.2 218.1 170.2 136.3 79.1 58.7 40.0 34.8 27.6 22.8 12.0
    1.67V 367.6 212.3 164.4 132.6 77.0 57.1 39.3 34.3 27.4 22.6 11.9
    1.70V 342.5 206.4 159.2 128.0 75.3 55.8 38.7 33.8 27.1 22.4 11.8
    1.75V 321.4 200.6 152.8 123.3 73.5 54.7 38.2 33.3 26.7 22.0 11.7
    1.80V 292.1 194.7 147.7 119.3 71.0 53.1 37.4 32.7 26.4 21.8 11.4