Giantz 12V 120Ah AGM deep-cycle battery for suitably matched caravan, camper, marine, solar and 4WD auxiliary systems. It provides approximately 1,440Wh of nominal energy in a sealed AGM format with bolt-down terminals and a carry handle.

Key Specifications

• Nominal voltage: 12V
• Rated capacity: 120Ah at the 10-hour rate
• Approximate nominal energy: 1,440Wh
• Battery type: sealed AGM deep cycle
• Overall dimensions: 33 × 17.1 × 21.6cm
• Approximate weight: 25kg
• Container material: ABS
• Terminals: bolt-down
• Internal resistance: approximately 5.4mΩ
• Maximum discharge current: 1,080A for 5 seconds
• Maximum charge current: 22.5A
• Listed cycle life: up to 1,400 cycles at 30% depth of discharge
• Listed self-discharge: approximately 3% per month at 25°C
• SKU: BATTERY-C-AGM-120

Charging Data

• Float charge: 13.5–13.8V
• Equalise charge: 13.8–14.1V
• Cycle charge: 14.4–15.0V
• Charge temperature: -20°C to 50°C
• Discharge temperature: -15°C to 50°C
• Storage temperature: -20°C to 50°C

Use charging equipment with a compatible AGM profile and do not exceed the listed maximum charge current. Confirm voltage settings against the current product manual before commissioning the system.

Runtime and Inverter Considerations

A 12V 120Ah battery contains approximately 1,440Wh of nominal energy. Actual usable energy depends on load, discharge rate, battery age, temperature, wiring losses and the manufacturer’s depth-of-discharge guidance.

The listed 1,080A value applies for five seconds only. It is not a continuous discharge specification. For inverter use, calculate the sustained DC current and confirm the battery, cable, fuse, isolator and connections can support it.

Installation and Care

• Measure the battery compartment and allow for the 25kg weight.
• Secure the battery and protect positive cabling with suitable over-current protection.
• Follow the manufacturer’s orientation and ventilation guidance.
• Recharge promptly after use and periodically during storage.
• Avoid repeated excessive discharge, which can shorten AGM service life.

Package Contents

• One Giantz 120Ah AGM deep-cycle battery
• User instructions

No separate portable battery box or charging accessories are listed as included.

Compare the Giantz 100Ah AGM battery and the larger MOBI 170Ah AGM battery, or browse the complete AGM battery range.

Frequently Asked Questions

Is 120Ah the usable capacity?

120Ah is the rated nominal capacity. Recommended usable capacity is lower and depends on discharge rate, battery condition and the manufacturer’s depth-of-discharge guidance.

Can solar panels charge this battery?

Yes, when connected through a compatible solar charge controller configured for AGM charging and within the battery’s voltage and current limits.