12V 75Ah Slimline Lithium Battery with in-built 20A DC-DC



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Baintech 12V 75Ah Slimline Lithium Battery with in-built 20A DC-DC will save you on weight and space! The slimline design allows you to fit a lithium battery into tight spaces, like under false floors and behind seats. At just 50mm thick, it’s the slimmest 75Ah battery on the market.

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Save on Space and Weight with Baintech Lithium

75Ah Slimline Lithium Battery with in-built 20A DC-DC  is constructed using the latest lithium iron phosphate cells. These prismatic cells are of the highest quality in a metal hard case. The battery has an inbuilt Battery Management System (BMS).

At just 8kg, the unique slimline shape makes it the perfect battery for installations where space is a premium. Slide it behind a seat, bolt it to a wall or at the back of a cupboard.

The Slimline battery provides up to 100A of continuous discharge or charge and can be stacked in parallel to increase amp hour storage capacity. Charge and discharge are via the two grey Anderson plugs. Note, an external fuse must be used. The strong aluminium outer enclosure delivers a safe, lightweight, and powerful unit which is the perfect building block for next-generation battery systems.


75Ah Slimline Lithium Battery with in-built 20A DC-DC Features:

  • Internal 100A BMS
  • Strong aluminium enclosure
  • Lightweight
  • Slimline shape and size
  • Parallel connect capable
  • Designed and fully assembled in Australia

75Ah Slimline Lithium Battery with in-built 20A DC-DC Specifications:

  • Model BTLITH1275-SL-DCS
  • Capacity 75Ah
  • Nominal Voltage 12.8V
  • Charge Voltage 14.6V max
  • Charge Current 100A
  • Discharge Current 100A max cont.
  • 200A surge
  • Operating Temp 0-45oC
  • Weight 8kg
  • Life at 80% DoD 2,000 cycles
  • Life at 50% DoD 5,000 cycles
  • Size (L x D x H) 635 x 265 x 50mm


Read on the blog, making the switch – AGM vs. Lithium.

Baintech lithium batteries are available in a range of 12V, 24V, and 36V models. Cut the weight and cost of paralleling batteries and use one battery for all your power requirements.

Engineered and locally manufactured in Brisbane, Baintech Lithium batteries have a 5-year warranty, designed using the latest lithium iron phosphate prismatic cells of the highest quality.

Save weight and boost performance by switching to lithium.

Check our 12V 95Ah Baintech Slimline Lithium Battery that includes bracket kit here.

Why our lithium batteries are superior to others in the market:

  • Massive 5 Year Warranty
  • Designed and assembled in Australia
  • Custom designed BMS System by engineers in Brisbane
  • The slimmest designs on the market; 75Ah and 110Ah Slim just 50mm thick
  • In-built DC-DC Charger capability available – unlike any lithium on the market
  • Constructed using the latest lithium iron phosphate cells
  • Local after-sales support

Why Lithium?

Lithium batteries provide more usable capacity than lead acid batteries. Deep discharging does not affect the life of a lithium battery the way it does with lead acid batteries. You can use the battery longer before needing to recharge, without damage to the battery.

Cost Effective Over Life Cycle

When considering the usable capacity and lifespan of lithium batteries, they work out cheaper than lead acid. When you add the cost and inconvenience of refitting new lead-based batteries every few years the total cost of ownership over the long term is far better with lithium batteries.

Longer life

Lithium batteries are rated for 2,000 – 5,000 cycles and much more if used carefully, giving you several times the life expectancy of standard lead acid batteries.


Lithium batteries allow you to pull far more amps out of the same size battery systems.


Lithium batteries are less than half the weight of the equivalent lead acid battery. Lithium batteries can be up to a third of the weight of the equivalent lead acid AGM battery. This is an important consideration for anybody who is mobile.

A 100Ah AGM deep cycle battery can be up to 38kg in weight, whereas the same size lithium battery can be less than 12kg in weight!

That means you can at least double or even triple the stored battery capacity on a RV, or alternatively use the reduction in battery weight to bring more water, or food or luggage on your trip.

Reducing weight in a RV helps to keep you under the tare weight, reduces aerodynamic drag which improves fuel efficiency while on the road.

Fast recharge

Lithium batteries charge more efficiently, and don’t require as many stages during charging. Therefore, they will charge faster, and hold more of the energy from solar panels and other charging device.


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