300AH 12V AGM Deep Cycle Battery

SKU: DC-12V-300AH
On sale! 21% off, save $139
$529.95 $669.00
Availability: In Stock (ready to ship)

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300AH Deep Cycle AGM Battery - Giant Power 300AH AGM Battery with Australia Wide Delivery & Fast Shipping

* This item is on BACK-ORDER ETA for DISPATCH 12/4/2019


For those who demand maximum power and unfailing performance, this 300AH Deep Cycle Battery is perfect! This 300AH battery will give you a huge possible power output, low self-discharge capacity and maintenance free construction. Deep cycle AGM Batteries are perfect for applications that require either frequent cycling or renewable power storage. Common uses include running appliances when camping away from power, using with a solar panel for charging, running in a dual battery system in a vehicle, or providing safe power on a boat. This battery is ideal for the consumer looking to set up a large scale power supply or is the perfect solution for large portable power storage.

When you need a long lasting battery that can withstand the tough Australian conditions, deep cycle AGM batteries are a great choice. AGM Batteries use glass mat technology within the battery to absorb the acid, as opposed to standard flooded batteries where the acid is free flowing. This provides several key advantages over standard batteries, such as allowing the batteries to be 100% sealed, non-gassing and maintenance free (batteries will never leak acid, even if damaged), and providing a significantly longer service and cyclic life (up to 2-3x longer than standard batteries). AGM batteries can last twice as long as a standard lead acid battery, making them more reliable and durable. This high capacity powerful battery provides a great response to load, and can handle constant discharge or occasional use with very little need to recharge. Ideal for a range of activities, including fishing trips, providing power whilst camping, providing power in a caravan or motorhome, or even for supporting a solar or wind energy system, the uses are endless! 

300AH 12V AGM Deep Cycle Battery Features:

  • Sealed Construction
  • Maintenance free operation
  • Non-Spillable, Non-Gassing
  • Designed Service Life 12 years
  • Ideal for frequent cyclic discharge
  • Exceptional deep discharge recovery performance
  • Low self-discharge characteristic
  • Spill-proof through acid encapsulation in matting technology
  • High specific power, low internal resistance, responsive to load
  • Vibration resistance due to construction
  • Stands up well to cold temperature
  • High Cycle life (1650 cycles)
  • Up to 5 times faster charge than with flooded technology
  A high turnover of battery stock ensures our customers are always getting the freshest battery

Not the exact Battery you're looking for ? BROWSE OUR FULL RANGE OF DEEP CYCLE BATTERIES  With AUSTRALIA WIDE SHIPPING AVAILABLE - Need Expert Advice - Freecall Now - 1800 853 315 

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300AH 12V AGM Deep Cycle Battery has a rating of 4.61/5 based on 23 reviews.

The BIG battery !

It's in and working well...Very happy at this point ,going away in a few weeks & will be giving it a the big test !

on 10 April 2019


Top response ordered Sunday night at my door Tuesday

on 30 March 2019

Awesome batteries

I recently brought a 300ah giant battery for my complete off grid system. Works great and is very durable, and need it to be very reliable as im living in a tent full time and can't afford to have no power. Looking to get 3 more....slowly. Great service and on time delivery.......to my front door of my tent!

on 9 March 2019

Peter O

Recieved 300ah battery for driving holiday to run and old Waeco 80l dual fridge charged by a 300w solar panel fridge in hot canopy all day full of food and drinks .300w battery perfect checked charge every morning 12.97 average

on 18 January 2019

300 Ah 12V AGM for my boat

I chose this battery for my boat after a recommendation from my son who had used Aussie Batteries to power his camper van. I did not have room to fit 2 x 130ah so the 300ah was just what I needed plus some spare capacity. It was delivered fast, is good value for price and is working well.

on 6 January 2019

300 ah giant battery

Awesome battery perfect for what I want fast delivery and very good price all good thank you.

on 5 December 2018


Pleased with this battery and the service from the lads at Aussie Batteries

on 21 November 2018


yet to try it but happy with it

on 24 October 2018

More Reviews Write a product review


Giant Power 12V 300AH AGM Deep Cycle Battery
Nominal Voltage 12V
Nominal Capacity (20HR) 300AH
Dimension Length: 522 ±3mm (20.55 inches)
Width: 268 ±2mm (10.55inches)
Container Height: 220 ±2mm (8.66 inches)
Total Height (with Terminal): 226 ±2mm (8.90 inches)
Approx Weight Approx 73.0 Kg
Terminal T11
Container Material ABS
Rated Capacity 300.0 AH/15.0A (20hr,1.80V/cell,25°C)
Max. Discharge Current 2500A (5s)
Internal Resistance Approx 2.5m?
Operating Temp.Range Discharge : -15 ~ 50oC (5 ~ 122oF)
Charge : 0 ~ 40oC (32 ~ 104oF )
Storage : -15 ~ 40oC (5 ~ 104oF)
Nominal Operating Temp. Range 25 ± 3°C (77 ± 5°F )
Bulk Charge Initial Charging Current less than 75A.
Voltage 14.5V @ 25oC
Temp. Coefficient -30mV/oC
Float Charge No limit on Initial Charging Current
Voltage 13.5V @ 25oC
Temp. Coefficient -20mV/oC
Capacity affected by Temperature 40oC (104oF) 103%
25oC ( 77oF ) 100%
0oC ( 32oF ) 86%
Self Discharge Giant Power Deep Cycle AGM batteries may be stored for up to 6 months at 25oC(77oF) and then a freshening charge is required. For higher temperatures the time interval will be shorter.


5 year battery warranty - 12 month full replacement warranty with 48 month pro-rata replacement warranty

For more information, please read our full warranty policy

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