SuperBatt vs SuperBatt DT120
We compare the SuperBatt and the SuperBatt DT120 across every dimension that matters - our scores, the key specs, and how each performs on the things you will actually notice day to day.
At a glance
| SuperBatt | SuperBatt DT120 | |
|---|---|---|
| Our score | 7.9/10 | 8.6/10 |
| Best for | Dependable, affordable off-grid power for caravans, motorhomes and boats | Dependable, affordable off-grid power for caravans, motorhomes and boats |
| Not ideal for | Heavy daily cycling where lithium's longer life would pay back | Heavy daily cycling where lithium's longer life would pay back |
| Brand | SuperBatt | SuperBatt |
Battery Type and Chemistry
SuperBatt
This leisure battery uses an AGM (VRLA) battery design, with electrolyte absorbed in glass mat separators and a sealed, non-spill format when used as intended. This chemistry is suited to deep-cycle leisure applications such as caravans, motorhomes and marine settings, where sealed construction helps with safer, cleaner handling. Compared with flooded lead-acid types, AGM batteries are typically associated with reduced routine maintenance, but correct charging practice remains important to avoid premature wear.
SuperBatt DT120
This leisure battery is a 12V deep-cycle leisure and marine battery. Deep-cycle batteries are designed for repeated discharging and recharging over longer periods, making this type suitable for running accessories for extended sessions, such as on boats or caravans, rather than for short bursts of high starting power. The product is also described as intended to replace other deep-cycle models such as 12V 110Ah or 12V 105Ah units, but any chemistry-specific compatibility should be verified first.
Capacity and Real Usable Power
SuperBatt
With a stated capacity of 140Ah at 12V, the SuperBatt is positioned for deep-cycle leisure use where stored charge is intended to support loads over longer periods. The effective usable energy depends on how far the battery is drawn down during typical discharge, because very deep discharge can reduce delivered performance due to system losses and battery behaviour at higher currents. Since the product title does not specify usable Ah percentages, the exact runtime under a given load cannot be confirmed. A 12V setup should also account for wiring and any inverter losses.
SuperBatt DT120
Despite it being marketed as a 12V 120Ah deep-cycle leisure and marine battery, the 120Ah figure is a stated capacity, not a guarantee of how much power will be usable in every situation. Usable energy depends on how deeply the battery is discharged, because drawing beyond the intended portion reduces available energy and increases stress on the battery. The DT120's rated capacity indicates it is intended to support steady loads for longer than smaller units, but results vary with wiring losses, operating temperature, and the size of the current draw. Consumers should confirm the intended discharge level and match the battery to the requirements of their device.
Cycle Life and Durability
SuperBatt
Cycle life and durability matter because a deep-cycle battery is expected to handle repeated charge and discharge rather than one long drain. For the leisure battery, the build is AGM and VRLA, sized for deep-cycle leisure use in caravans, motorhomes and marine set-ups. Durability depends on staying within the intended deep-cycle discharge pattern; frequent deep discharges can shorten usable life. When the battery is used within moderate cycling and avoided extreme conditions, cycle performance typically holds up better than a battery used in a starter-style role.
SuperBatt DT120
Cycle life and durability matter because deep-cycle leisure and marine batteries are designed for repeated charge and discharge cycles. The SuperBatt (79GY) is a 12V 120Ah deep cycle leisure and marine battery intended for that kind of ongoing use. Durability is influenced by discharge depth, charging consistency and operating conditions, as capacity losses can develop gradually over time. Heat also reduces lifespan, so storage and use temperature are relevant considerations for long-term performance.
Fitting and Charging
SuperBatt
Proper fitting and charging largely determine how reliably an AGM deep-cycle battery performs over time. The first step in a 12V 140Ah SuperBatt AGM1200 installation for caravan, motorhome, or marine use is planning the placement so the battery is mounted securely, the terminals are protected, and the correct polarity is confirmed before any power is connected. Charging must be matched to AGM needs, using a charger set up for AGM and 12V output, with current and voltage kept within the charger's rated AGM settings. During the first charge, expect longer settling, especially if the battery has been stored. After tightening connections firmly, recheck them after the initial run.
SuperBatt DT120
When fitting and charging a deep-cycle leisure or marine battery such as the leisure battery (12V 120Ah), the priority is to connect it safely and match the charger to the battery correctly. Buyers should confirm the battery area is vented and that the terminals are dry, then secure the battery to prevent movement. Next, he connects the positive lead first, then the negative, keeping cables clear of sharp edges and metal. For charging, he uses a charger intended for 12V batteries and follows the charger's settings rather than guessing. If the battery becomes warm or shows faults, he stops charging and rechecks the wiring before continuing.
Who Is This For?
SuperBatt
This 12V 140Ah SuperBatt AGM1200 deep-cycle AGM leisure battery is designed for applications where a non-spillable (VRLA) battery is required, such as caravan, motorhome, or marine use. It is most suitable for people replacing an existing 12V leisure battery with an AGM type, particularly where a sealed design is preferred over conventional spillable batteries. It aligns with the AGM construction and deep-cycle intent for leisure set-ups.
SuperBatt DT120
This battery suits people who need a 12V deep-cycle leisure or marine option, including replacement use when moving from a 12V 110Ah or 12V 105Ah battery to the SuperBatt rated at 120Ah. It is aimed at buyers looking for a like-for-like capacity level within a 12V system, rather than switching voltage. Because it is described for leisure and marine deep-cycle use, it can be relevant for caravan use, boat use, and other applications with steady loads over time.
SuperBatt: pros
- AGM deep-cycle
- 140Ah at 12V
- Suits caravan, motorhome, marine
- Proven, affordable off-grid power
Cons
- Only around half the rated capacity is safely usable
- Heavier and shorter cycle life than lithium
- Match the capacity to your real daily power draw
SuperBatt DT120: pros
- Deep-cycle leisure battery
- 120Ah at 12V
- Suits marine
- Proven, affordable off-grid power
Cons
- Only around half the rated capacity is safely usable
- Heavier and shorter cycle life than lithium
- Match the capacity to your real daily power draw
Our verdict
Our pick is the SuperBatt DT120 (our score 8.6/10) - A practical leisure battery (deep-cycle, 120Ah) for off-grid and leisure power. The SuperBatt is still worth it if it is cheaper when you check, or if it better matches your specific needs.