Thumper Lithium 40 AH Battery Pack BATL-40 | Dual Battery system

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Sale price$809 Regular price$899


The Thumper Lithium battery pack!

Includes:  1 x 240 Volt LiFePO4 Battery charger 5 Amp

The Thumper Lithium battery pack is a reliable, compact and lightweight alternative to the standard lead acid portable dual battery system.

​Designed with the latest technology of Lithium LiFePo4 cells, the Thumper offers a fully sealed and maintenance free battery pack that can safely be used on any side.

​Equipped with an internal Battery Management System (BMS), the Thumper Lithium offers safe charging and discharging with over temperature protection, under and over voltage cut off protection and internal short circuit protection.

The Thumper range of Lithium battery packs have a usable power of 95% capacity. At this point, the BMS system within the Thumper will shut down all power to the unit.  In order to reset the BMS, an charge load must be connected to the battery.

​Note: The Thumper Lithium is not suitable for Jump-Starting


The Thumper Lithium 40 AH is the perfect option for the individual looking to run a 40-50Lt compressor driven fridge for up to 60 hours.

It has never been easier to understand your battery set up! This unit has been fitted with the calibrated digital display screen, providing the user with a complete digital reading of:

  • Battery Voltage
  • Remaining amp hour capacity
  • The current input / output draw on the battery (both watt & amp reading)
  • Remaining run time for discharge / or remaining time to recharge

The unit is equipped with:

1 x Digital display screen                                1 x Anderson (Max. 20Amp rating)

2 x Cigarette socket                                        1 x Dual USB socket (Min. 2.4Amp)

1 Engel Fridge socket                                     1 x 2.1mm Input / Output     

1 x Internal circuit breaker protection             1 x Manual reset 15 Amp circuit breaker


Product code



40 AH

MAX Discharge

40 Amps

MAX Input charge

40 Amps


240L x 190W x 180H


5.2 kg


3 years



The Thumper 40 AH includes the complete vehicle wiring loom (TUR-L).

The wiring loom will allow for the Thumper Lithium pack to charge from the vehicle whilst driving and will separate from the main starter battery when the vehicle ignition is off.

This particular kit does not include a DC charger.

The Thumper Lithium will charge perfectly within most vehicles without the use of the DC charger, providing the following conditions are satisfied:

  • The vehicle must have an output of approx. 13.8 Volts (Voltage output below this point would recommend the use of a DC charger).
  • The TUR-L must be installed.
  • It is recommended to charge from 240 Volt every 6-8 weeks to ensure battery reaches full capacity.


Available to purchase as an optional extra for the TL-40 is:  

  • TL-A-C1.2 Cigarette charge lead
  • 240 Volt battery Charger (recommended 5 - 8 Amps to suit this model)

  Average run - GUIDE

35 - 50Lt Compressor Fridge 0*C at 25*C Ambient Temperature

 Capacity Lithium run time AGM run time
90 AH 135 HOURS 83 HOURS
Discharged to 90% capacity at 11.8 Volts Discharged to 80% capacity at 11.8 Volts


How to reset the digital display screen:

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