Deep Cycle Systems

120Ah Slimline Deep Cycle LFP Battery

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Every DCS LFP battery features DCS own custom and proprietary BMS that has been continuously refined and improved up since it was first introduced in 2018. The DCS 3S BMS is paired with our stand-alone DCS 16 channel 59.2A Active Cell Balancing System. Both have been designed to pass MIL-STD-810G (Method 514.6) vibration testing requirements which ensures that these batteries remain reliable even in the most punishing of conditions.


All DCS LFP batteries also feature our comprehensive Bluetooth system that in conjunction with the DCS LFP App displays the following:

• Battery pack Voltage.

• State of Charge (SOC) % estimate via impedance tracking.

• Amp meter displaying real time charge and discharge current.

• Time remaining (estimate in real time).

• BMS Mosfet temperature status (for winching or large inverter loads).

• Battery pack cycle count.

• Cell status showing real-time active balancing operation.

• More accurate data compared to external battery monitors (shunts).


The 120Ah Slimline lithium battery features two pairs of Anderson connector terminals (one positive and one negative) that are internally bridged with copper busbars and included are two pairs of 120A Anderson connectors with cables & lugs which provides more surface area for additional connections, enables a cleaner and more organized cable management when parallel connecting multiple batteries. Also included is a set of four wall mounting brackets.

The metal enclosure ensures that the battery is fully serviceable, even after the 5 year warranty period has expired, so that the battery can be serviced and components replaced. The unique form factor of these Slimline batteries make them ideal for installations locations that are space challenged.


This Battery is rated to achieve a minimum of 4000 cycles @ 100% DOD (when ≤ 80% of its original capacity retention has been reached @ 77F). That means that this battery is rated to achieve at least 4000 cycles by the time it has faded 20% from its original capacity, that is, when ≤ 80% of its original capacity retention has been reached.


  • • A slim LFP Battery that is under 2” in thickness.
  • • Custom and proprietary, MIL-Spec vibration tested, high performance BMS and active balancing, stand-alone CMS.
  • • Continuous Charge and discharge Currents are significantly higher than the industry standard.
  • • Durable metal enclosure (Serviceable).
  • • Engine starting capable - 1000 LCA
  • • Guaranteed grade A - proprietary, cylindrical DCS cells
  • • A single 120Ah battery can support up to a 2000W inverter
  • • Fully featured DCS App with Bluetooth 4.0 monitoring
  • • Twin Terminal Configuration (two sets of positive and two sets of negative terminals, each set bridged with internal copper bus bars.
  • • Twin 120A Anderson Connector Cables and Wall Mounts are included.
  • • Engineered & tested in the Australian Outback.
  • • 5 year Warranty
  • Nominal Voltage: 12V
  • Nominal Capacity: 120Ah
  • Dimensions: 27.165" x 1.968" x 11.811"
  • Weight: 47.3 lbs
  • Terminal Type: Anderson Connector
  • Cell Type: Cylindrical Cells - 3.2V (15Ah)
  • Cell Chemistry: Lithium Ferro Phosphate Cells (LFP)
  • Cell C-Rate Specification: 2C
  • Cycle Performance: 4000 Cycles @ 100% DOD (when ≤ 80% Capacity Retention has been reached @ 77F).
  • Max Charge Voltage: 14.6V
  • Recommended Charge Current: ≤ 80A (≤ 0.7C)
  • Max Charge Current: ≤ 120A (≤ 1.0C)
  • Max Discharge Current: ≤ 160A (≤ 1.3C)
  • BMS Type: DCS 3S 160A
  • Lithium Cranking Amps: 1000 LCA
  • Ingress Protection: IP54