PowerBrick lithium battery + 12V 40Ah

PowerTech Systems

522,16 € tax incl.

PowerBrick lithium battery + 12V 40Ah

With a very high service life (from 2000 to several thousand cycles) and a deep discharge capacity (up to 100%), the PowerBrick battery is suitable for many uses such as lighting, electric vehicles, energy storage, UPS...

Dimensions (mm): 196 x 135 x 172

Weight (Kg): 5.25


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LiFePo 40Ah Lithium batteries

The lithium batteries are sealed batteries requiring no maintenance, not adding distilled water. Security strengthened compared to the open lead batteries.
Battery lithium PowerBrick + can support 100% discharge and find its rated capacity if discharged hold time is short. The BMS (Battery Manager Service) built into the case maximizes battery life and secures the battery.

Lithium iron Phosphate (LiFePO4 or LFP) technology


technology Lithium Ferro Phosphate (also called LFP or LiFePO4) is trying to supplant other battery technology of the fact of its technical strengths and his very high level of security.

• High power density, this technology is used in applications of medium traction power.
• Life calendar > 10 years;
• Number of cycles: from 2000 to several thousand. Deep cycling can use LiFePO4 in energy storage applications; Extremely secure technology (no Thermal Runaway phenomenon);
• Very low toxicity to the environment (use of iron, graphite and phosphate);
• Very good resistance to temperature (up to 70 ° C);
• Very low resistance inside. Stability, or even decrease over the cycles;
• Constant power during the range of discharge;
• Ease of recycling.



 Data sheet

 PB + 7.5AhPB + 12AhPB + 20AhPB + 40AhPB + 55AhPB + 100Ah
CertificationsCE, RoHS, a 38.3 and CB
Main features
Rated voltage12.8V
Rated capacity7.5 ah12 ah20 ah40 ah55 ah100 ah
Energy96.0 Wh153.6 Wh256 Wh512 Wh704 Wh1280 Wh
Number of cycles> 2000 cycles (see abacus)
Self-discharge< 3% per month
Energy efficiency> 96%
Standard charge
Load voltage14.6V ± 0.1V
Charge modeCC/CV: Constant Current / Constant Voltage
Standard charge current
/ maximum
5A / 7.5 HAS6A / 12A10A / 20A20 A / 40 A20A / 55A50A / 100A
BMS cut-off voltage14.8V ± 0.1V
Standard discharge
DC of
15A24 A40A50A55 A100A
Maximum discharge current20A (< 10 s)30A (< 10 s)60A (< 10 s)80A (< 10 s)80A (< 10 s)150 A (< 10 s)
BMS cut-off voltage10 V
Temperature load0 ° C to 45 ° C @ 60±25% relative humidity
Discharge temperature-20 ° C to 60 ° C @ 60±25% relative humidity
IP protectionIP 66
Cells and Assembly18650 4S5P
DimensionsL: 151mm x
P: 65mm x
H: 92 mm
L: 151mm x
P: 98mm x
H: 95 mm
L: 180mm x
P: 76mm x
H: 168 mm
L: 196mm x
P: 135mm x
H: 172 mm
L: 228mm x
P: 138mm x
H: 210 mm
L: 260mm x
P: 168mm x
H: 212 mm
Weight1.08 kg1.55 kg2.80 kg5.25 kg7.8 kg13.6 kg
TerminalClip Faston 6.35 mmClip Faston 6.35 mmM5M6M8M8

Measure of the State of charge (SoC) by Coulomb counter


To track the State of charge when using the battery, the most intuitive method is to follow the current incorporating during the use of the cells. This integration gives directly the amount of electric charge injected or extracted to the battery allowing to precisely quantify the SoC of the battery.

Unlike the OCV method, this method is able to determine the evolution of the charge for the use of the battery State. It does not require that the battery is at rest for a precise measurement.



Although the current is measured by a precision resistance, low errors of measures involved, related to the frequency of sampling of the measure. To correct this marginal, the Coulomb counter is automatically re-calibrated to each charge cycle.
By coulomb counting SoC measurements allow a less than 1% measurement error, which allows a very accurate indication of the remaining energy in the battery. Unlike the method GCO, coulomb counting is independent of fluctuations in power delivered by the battery (that cause the battery voltage drops), and the accuracy remains constant regardless of the use of the battery.


Battery capacity40Ah
Weight5,25 kg