Battery lithium PowerBrick + 48V 25Ah

PowerTech Systems

1 452,90 € tax incl.

Battery lithium PowerBrick + 48V 25Ah

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): 260 x 168 x 212

Weight (Kg): 13.6

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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.

Possible discharge (up to 100%)


• The PowerBrick 48V-25Ah integrates in its case an innovative control system (BMS) to ensure a high level of security to use. The BMS control and constantly balance battery cells, in order to protect the battery and increase its service life. The BMS also protects the battery from rough treatment: deep discharge, charging voltage too high, etc.


• Very low self-discharge (< 3% per month)


• Since a PowerBrick battery+ Paut be discharged to 100% of its capacitya lead AGM battery can be replaced by PowerBrick+ with capacity 2 x lower than the lead-acid battery (ex: a PowerBrick)+ 50Ah replaces an AGM 100Ah battery).




Flexible system: up to 10 packs in parallel and in series 4


• Battery Lithium PowerBrick + 12V-70Ah has a nominal voltage of 12.8V. It can be easily assembled in series (up to 4 battery in series) and in parallel (up to 10 batteries).

• Final Assembly voltage can be 12V to 48V (for 4 packs assembled in series), which meets the needs of almost all electrical applications of traction, solar or wind energy storage, servitude, robotics, trolleys, etc.

• Very low losses of Peukert (efficiency > 96%)

BMS (Battery Management System) built into the case: maximizes battery life and secures the battery


• The battery is protected by a waterproof ABS caseresistant to splashing water and dust)Degree of protection IP66).

• Technology Lithium iron Phosphate completely safe (no risk of explosion or self-ignition).

• Constant power during any discharge (low internal resistance)

• Excellent temperature resistance (-20 ° C to + 60 ° C)

Weight gain > 50% and size decreased by 40% compared with the lead-acid batteries

• The PowerBrick range+ has been designed to replace the lead-acid battery, offering a quadrupled energy density for a weight and size equivalent.

• To share its technology, the PowerBrick lithium battery+ 25Ah-48v can be installed in any position (vertical, lying on the side or upside down).

• The electrical parameters of the PowerBrick lithium battery+ 48v-25Ah are compatible in every way with those of a lead AGM of 48V battery. In the majority of cases. the charging system can be kept identical and no complementary accessory is required to perform the replacement.

• Products PowerBrick+ are lightweight, compact, powerful and can be used for all types of uses and applications. The PowerBrick+ directly replace older generation batteries (batteries lead VRLA, AGM or OPZ) 48vinefficient and harmful to the environment (use of heavy metals) and complexity of recycling.

• The PowerBrick range+ benefits of a 2-year commercial warranty.

• Life calendar > 10 years

• Low toxicity to the environment

• Certification: this, RoHS, a 38.3





• Electric vehicles, trolleys;

• Storage of solar and wind energy;

• Navy;

• Lighting;

• Security camera;

• UPS, emergency power;

• Telecommunication;

• Medical equipment;


 Data sheet


ElectricRated voltage25.6V
Rated capacity50Ah
Energy1280 Wh
Internal resistance≤ 50mΩ
Number of cycles> 2000 cycles (see abacus)
Self-discharge< 3% per month
Energy efficiency96% ~ 99% @ 1 C
Standard chargeLoad voltage28.8V ± 0.4V
Charge modeCC/CV: Constant Current / Constant Voltage
Standard charge current (maximum continuous current)25 A / 50A
BMS cut-off voltage29.4V ± 0.2V
Standard dischargeContinuous discharge current75 A (1.92 kW)
Current max. Discharge (< 30 s)115 A (3.0 kW)
BMS cut-off voltage 10V
EnvironmentTemperature load0 ° C to 45 ° C @ 60±25% relative humidity
Discharge temperature-20 ° C to 60 ° C @ 60±25% relative humidity
Storage temperature0 ° C to 40 ° C @ 60±25% relative humidity
IP protectionIP 66
MechanicsCells and Assembly26650 8S16P
DimensionsL: 260mm x D: 168mm x H: 212 mm
Weight13.6 kg

Measure of the State of charge (SoC) by method OCV (Open Circuit Voltage or voltage in open circuit)

All types of batteries have one thing in common: the tension their Terminal decreases or increases based on their level of support. The voltage will be maximum when the battery is fully charged and minimal when it is empty.

This relationship between SOC and voltage is directly dependent on the used battery technology. For example, the diagram below below compares the curves of discharge between a lead battery and a Lithium-Ion batteries.


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 capacity25Ah
Weight13,6 kg