Views: 0 Author: Site Editor Publish Time: 2026-07-01 Origin: Site
For many battery module projects, Farasis 73Ah and 76Ah NCM pouch cells have been popular choices because of their high energy density, flat pouch structure and module-friendly dimensions. These cells are often used in electric vehicle modules, electric motorcycles, industrial battery packs, energy storage prototypes and custom high-voltage lithium battery systems.
However, one common problem in real projects is supply stability. When 73Ah or 76Ah pouch cells are temporarily unavailable, engineers and procurement teams need a practical alternative that can fit the existing module structure with minimal redesign.
In this situation, the P70 pouch cell is often considered as an alternative option. It has a similar voltage platform, similar pouch-cell structure and close capacity range. For module builders, the key question is not only “Can the cell fit?” but also “Can the module remain safe, balanced and consistent after replacing the original cell?”
This article compares the Farasis 73Ah, Farasis 76Ah and P70 pouch cells from a module design perspective, and explains what should be checked before using P70 as a replacement cell.
Need to replace Farasis 73Ah or 76Ah cells in an existing module? Misen can help check P70 availability, mechanical drawings, tab position, datasheets and sample matching before mass assembly. View the P70 pouch cell details or contact us to get the latest stock and technical documents.
| Item | Farasis 73Ah Pouch Cell | Farasis 76Ah Pouch Cell | P70 Pouch Cell |
|---|---|---|---|
| Chemistry | NCM lithium-ion pouch cell | NCM lithium-ion pouch cell | NCM lithium-ion pouch cell |
| Nominal Voltage | 3.7V | 3.7V | Around 3.7V |
| Nominal Capacity | 73Ah | 76Ah | Around 70Ah |
| Typical Application | EV module, e-mobility, ESS, industrial pack | EV module, e-mobility, ESS, industrial pack | Replacement module, EV module, custom pack |
| Dimension Platform | Approx. 294mm length class | Approx. 294mm length class | Similar platform, final drawing required |
| Module Replacement Potential | Original option | Original option | Suitable alternative after verification |
The 73Ah and 76Ah cells are usually selected when the project requires higher capacity in a compact module space. The P70 cell has slightly lower capacity, but it can be easier to source in some cases and may reduce project delays when 73Ah or 76Ah stock is limited.
Large-format NCM pouch cells are popular in module design because they provide high energy in a flat, space-efficient structure. Compared with cylindrical cells, pouch cells can reduce the number of parallel connections, simplify busbar design and improve space utilization inside the battery enclosure.
The 73Ah and 76Ah pouch cells are especially useful for applications that require:
High energy density in a compact battery pack.
Fewer cells in parallel.
Lower connection complexity.
Flexible module layout.
Large single-cell capacity for EV or industrial systems.
For example, in a 20S1P module, using a 76Ah cell gives a nominal battery system of about 74V and 76Ah. If the same module is built with a P70 cell, the voltage platform remains similar, but the available capacity will be reduced to around 70Ah. This means the customer may accept a slightly shorter runtime in exchange for better availability.
When the original 73Ah or 76Ah pouch cell is unavailable, P70 can be a practical alternative for three main reasons.
First, it belongs to a similar capacity class. Although P70 has lower nominal capacity than 73Ah or 76Ah, the difference is not as large as switching to a 50Ah or 60Ah cell. For many module projects, this makes it easier to adjust the system design.
Second, the voltage platform is close. If the nominal voltage, charge cut-off voltage and discharge cut-off voltage are the same or very close, the BMS setting can often be adjusted without changing the full battery architecture.
Third, the mechanical format can be close enough for some module designs. If the cell length, width, thickness and tab position match the module fixture, P70 may be used without redesigning the full enclosure. However, this must be checked with real drawings, not only with the model name.
The most direct change is usable capacity.
If a module was originally designed with 76Ah cells and is changed to P70, the capacity may decrease by about 8%. If the original design used 73Ah cells, the decrease may be around 4%.
For example:
A 20S1P module using 76Ah cells is approximately 74V 76Ah.
A 20S1P module using P70 cells is approximately 74V 70Ah.
The voltage level is similar, but the total energy is lower. This affects runtime, range and backup time. For customers, this should be clearly explained before replacement.
For many industrial and mobility applications, this reduction is acceptable if the customer mainly needs fast delivery, similar module size and stable cell availability. But for projects with strict runtime requirements, the system energy must be recalculated.
Even small differences in pouch cell thickness can affect the final module stack. A 0.2mm or 0.5mm difference per cell may become significant when many cells are stacked together.
Before replacing 73Ah or 76Ah with P70, check:
Cell length.
Cell width.
Cell thickness.
Tab position.
Tab size and polarity direction.
Swelling allowance.
Compression plate space.
If the module uses a fixed aluminum frame, end plate or plastic holder, the P70 cell must be physically tested before mass assembly.
Pouch cell replacement is not only about the cell body size. The tab structure is equally important.
Even if the cell body fits, the original busbar may not match if the tab spacing, tab width or tab direction is different. This may require a new copper busbar, flexible nickel-copper connector or laser welding fixture.
Before replacement, confirm:
Positive and negative tab location.
Tab material.
Tab thickness.
Welding area.
Distance between tabs.
Clearance to insulation board.
For module projects, tab matching is often the difference between a simple replacement and a full mechanical redesign.
If the original module was designed for 73Ah or 76Ah, changing to P70 means the BMS capacity setting should be updated.
The voltage limits may remain similar if the chemistry platform is the same, but the rated capacity, SOC calculation and protection logic should be reviewed.
Recommended checks include:
Rated capacity setting.
Charge current limit.
Discharge current limit.
SOC calibration.
Cell balancing threshold.
Over-voltage and under-voltage protection.
Temperature protection range.
If the BMS still calculates SOC based on 76Ah while the real cell is around 70Ah, the displayed remaining capacity may be inaccurate.
For pouch cell modules, consistency is very important. Cells should be matched before assembly, especially when building high-voltage packs or modules with cells in parallel.
Recommended matching items include:
Capacity.
Internal resistance.
Open circuit voltage.
K value / self-discharge.
Appearance and swelling inspection.
Production batch.
Cell weight.
Do not mix old 73Ah cells, 76Ah cells and new P70 cells in the same parallel group unless the engineering team has fully evaluated the risk. Different capacity and aging levels can cause current imbalance during charge and discharge.
For replacement projects, it is usually safer to use the same cell model within the same module, or at least within the same series string.
Pouch cells have a large flat surface, which is good for heat transfer when the module uses cooling plates, thermal pads or aluminum side plates. But the thermal path must be consistent across all cells.
When switching from 73Ah or 76Ah to P70, check whether the cell surface area, thickness and compression pressure still match the original thermal design.
If there is poor contact between the cell and the cooling structure, some cells may run hotter than others. This can reduce cycle life and increase safety risk.
For high-current applications, temperature sensors should be placed near the hottest area of the module, not only near the BMS board.
Large-format pouch cells need proper mechanical support. During charge and discharge cycles, pouch cells may expand slightly. A good module design should control swelling while avoiding excessive pressure.
Before using P70 in a module originally designed for 73Ah or 76Ah, check:
Compression force.
End plate strength.
Insulation layer thickness.
Foam pad recovery.
Cell expansion space.
Long-term cycle stability.
Too little compression may reduce consistency. Too much compression may damage the cell or affect cycle performance. The compression structure should be reviewed based on the actual cell datasheet and module design.
In some projects, yes. But it should not be treated as a blind drop-in replacement.
P70 can be considered when:
The customer accepts slightly lower capacity.
The voltage platform is compatible.
The cell dimensions match the module space.
The tab position works with the busbar design.
The BMS settings can be adjusted.
The cells are matched by capacity, voltage and internal resistance.
The thermal and compression design is checked.
P70 is not recommended as a direct replacement when:
The project requires exactly the same runtime.
The module has no extra tolerance for thickness or tab position.
The BMS cannot be reprogrammed.
The pack contains mixed old and new cells.
The application has very high peak current requirements without testing.
The customer requires the exact original cell model for certification or maintenance.
For new module projects, P70 can be designed from the beginning as the main cell option. This gives the engineering team more flexibility in the busbar, fixture, BMS and thermal design.
For existing modules originally designed around 73Ah or 76Ah cells, P70 should be treated as an engineering replacement option. The best process is:
Confirm the original cell drawing.
Confirm the P70 drawing.
Compare body size and tab position.
Build a small sample module.
Test charge and discharge performance.
Check temperature rise.
Check BMS SOC accuracy.
Confirm customer acceptance of lower capacity.
Start batch assembly only after sample verification.
This process helps reduce the risk of rework, imbalance or customer complaints.
The 73Ah, 76Ah and P70 pouch cells can be used in many similar applications, including:
Electric vehicle battery modules.
Electric motorcycle battery packs.
Industrial mobile equipment.
AGV and AMR battery systems.
Energy storage battery modules.
Marine and RV lithium battery packs.
High-voltage custom battery systems.
Prototype battery modules.
For projects that require high energy density and flexible module design, NCM pouch cells remain a strong option. The final choice should depend on supply availability, module space, current requirement, cycle life target and total project cost.
Misen Power supplies NCM pouch cells and supports custom battery module projects for customers who need flexible cell sourcing, module design and pack assembly support.
For Farasis 73Ah, Farasis 76Ah and P70 pouch cell projects, we can help customers with:
Cell model comparison.
Alternative cell recommendation.
Cell matching and grading.
Busbar and connector suggestions.
BMS selection.
Module structure review.
Sample testing support.
UN38.3, MSDS and shipping document coordination.
If your original 73Ah or 76Ah pouch cell is out of stock, P70 may be a practical alternative. Before mass production, we recommend confirming the mechanical drawing, BMS setting, capacity requirement and module assembly method.
Farasis 73Ah and 76Ah pouch cells are strong choices for high-energy battery modules, especially when the project needs compact size and large single-cell capacity. But when these cells are not available, P70 can be a useful alternative for many module projects.
The key is proper engineering verification. Capacity, voltage, dimension, tab structure, BMS setting, thermal management and compression design should all be reviewed before replacement.
A good replacement cell is not simply the one with the closest capacity. It must also fit the module, match the electrical system and remain consistent during long-term use.
For customers building custom pouch cell modules, Misen can help evaluate whether Farasis 73Ah, Farasis 76Ah or P70 is the better choice based on real project requirements.
P70 can be considered as an alternative if the customer accepts slightly lower capacity and the mechanical dimensions, tab position, BMS settings and thermal design are compatible.
It may be possible, but the capacity difference is larger than replacing 73Ah. The module energy and runtime should be recalculated before replacement.
It is generally not recommended to mix different capacities or different batches in the same module, especially in parallel groups. Cell consistency should always be checked before assembly.
The most important items are cell dimensions, tab position, voltage platform, capacity, internal resistance, BMS settings, thermal contact and compression structure.
Yes, P70 can be suitable for EV and industrial battery modules if the module design, current requirement and safety conditions are properly verified.
