The Farasis P53B is a high-energy rechargeable lithium-ion pouch cell designed around 55.9Ah and 207Wh at 0.33C. The 2020 validation report records slightly higher measured capacity and energy, strong -20°C discharge retention, low resistance, stable storage behavior and promising fast-charge cycle results. These findings are sample-test results and should be confirmed against the current controlled production specification before pack design.
01 Measured Capacity Above Design Value
The design capacity is 55.9Ah at 0.33C and 54.2Ah at 1C. Tested values reached 56.3Ah and 54.4Ah under the corresponding rates, while a larger production dataset recorded a 56.352Ah average across 5,183 results. These measurements demonstrate the tested population’s performance but should not replace the controlled minimum-capacity specification.
02 High Single-Cell Energy Density
The P53B is designed for 207Wh at 0.33C and 197Wh at 1C, while tested values reached 208Wh and 197Wh. Measured energy density was 254Wh/kg and 564Wh/L at 0.33C. Its approximately 10mm-thick pouch format supports compact, energy-focused modules when suitable compression, swelling allowance and mechanical protection are provided.
03 Strong Low-Temperature Discharge
During a -20°C test, the cell delivered 48.5Ah and 161.1Wh at 1C to a 2.1V cut-off. This represented 91.5% capacity retention and 83.8% energy retention compared with the 25°C reference. The result supports cold-environment evaluation, although the lower test cut-off and application-specific thermal conditions must be considered.
04 Pulse-Power Characterization
Farasis evaluated 10-second and 30-second charge and discharge power at multiple temperatures and SOC levels. HPPC testing recorded 2.40mΩ at 50% SOC during a 3C, 30-second discharge at 25°C. Because the report does not state a single approved maximum current, BMS limits must follow the current production specification and pack-level validation.
05 Stable Storage Performance
After 28 days at 25°C and full SOC, tested charge retention was 99.9% and recovery was 101.8%. After seven days at 55°C and full SOC, retention remained 96.8% with 100% recovery. These sample results indicate stable storage behavior under the specified tests but do not define the recommended commercial storage window.
06 Cycle and Safety Validation
At 25°C, two fast-charge and 1C-discharge samples retained approximately 98% capacity after 565-566 cycles, supporting a projected life above 1,500 cycles. The report also records passing sample results for overcharge, over-discharge, crush, short-circuit, heating, temperature cycling, seawater immersion, drop and low-pressure tests. These evaluations are not certification claims.
Custom battery pack applications: Subject to confirmation against the current Farasis production specification, the P53B may support electric vehicles, commercial mobility, AGVs, robotics, marine systems and high-energy industrial battery modules. Misenpower supplies cells and supports custom pack integration with a matched BMS, fuse protection, welded tab interconnects, voltage and temperature sensing, insulation, controlled compression, cooling and mechanical restraint. Where applicable, supporting CE, UN38.3, RoHS and UL documentation can be provided for the relevant product and shipment; availability, scope and validity must be confirmed before ordering.
