Custom Capacity Battery Pack Manufacturer
Need a battery pack that delivers a specific runtime, capacity, or energy output?
Nuranu designs and manufactures custom capacity battery packs according to your product’s power consumption, required runtime, current demand, available space, weight limitations, and operating conditions.
We can customize: battery capacity, voltage, cell configuration, cell type, battery dimensions, discharge current, BMS, connector, charging specifications and battery enclosure.
From initial prototype to OEM mass production, Nuranu provides complete custom lithium battery pack development.
What Is Battery Capacity?
Battery capacity describes how much electrical energy a battery can store and deliver under specified conditions.
Capacity is commonly expressed in:
- Amp-hours (Ah)
- Watt-hours (Wh)
For many battery applications, Ah alone is not enough to compare total stored energy because battery voltage also matters.
A useful relationship is:
Energy (Wh) ≈ Voltage (V) × Capacity (Ah)
For example, a nominal 14.8V, 5Ah battery has approximately:
14.8V × 5Ah = 74Wh
The actual usable energy depends on factors such as discharge conditions, cutoff voltage, temperature, battery aging, and system efficiency.
This is why Nuranu evaluates voltage, capacity, current, and runtime together when designing a custom battery pack.
Custom Battery Capacity Based on Your Application
A battery should be designed around the actual requirements of the product.
For example, a cordless device may require:
- 30 minutes of runtime
- 60 minutes of runtime
- 2 hours of runtime
- 8 hours of runtime
The required capacity depends on the device’s power consumption.
A simplified estimation is:
Required Energy ≈ Power Consumption × Operating Time
For example, if a product consumes approximately 100W and needs to operate for 2 hours:
100W × 2h = 200Wh
The final battery capacity should then account for efficiency losses, operating conditions, usable depth of discharge, and other system requirements.
Nuranu can help translate your runtime target into a practical battery configuration.
Capacity Is More Than an Ah Number
A common mistake is specifying only: “I need a 10Ah battery.”
A battery manufacturer also needs to understand:
- Required voltage
- Continuous current
- Peak current
- Runtime
- Cell chemistry
- Available space
- Weight limitations
- Operating temperature
- Charging method
- BMS requirements
Two 10Ah batteries can have completely different performance characteristics.
For example:
- 10Ah × 12V ≈ 120Wh
- 10Ah × 24V ≈ 240Wh
- 10Ah × 48V ≈ 480Wh
The same Ah rating does not mean the same amount of stored energy.
That is why Nuranu designs capacity together with voltage and application requirements.
Custom Capacity Battery Pack Configurations
Battery capacity is affected by how cells are connected.
Series Configuration
Connecting cells in series primarily increases voltage.
- 1S
- 2S
- 3S
- 4S
- 5S
- 6S
- 8S
- 10S
- 13S
Parallel Configuration
Connecting cells in parallel increases:
- Capacity
- Available current capability
For example:
- 3S1P
- 3S2P
- 3S3P
- 4S1P
- 4S2P
- 4S3P
- 6S2P
- 6S3P
- 10S2P
- 13S2P
A configuration such as 4S2P means four cell groups are connected in series, with two cells connected in parallel in each group.
This allows battery engineers to balance:
- Voltage
- Capacity
- Current
- Size
- Weight
- Cost
Custom Capacity and Battery Voltage
Custom capacity cannot be considered independently from voltage.
For example, a customer may request:
- 14.8V 10Ah
This specification defines both:
- Voltage
- Capacity
The battery engineer must then determine:
- Cell chemistry
- Cell capacity
- Number of cells
- Series configuration
- Parallel configuration
- BMS
- Charger
- Physical layout
This is where professional battery engineering becomes important.
Need a Specific Battery Voltage?
See:
High Capacity Battery Pack Design
Increasing capacity can provide longer runtime, but it can also increase:
- Battery size
- Weight
- Cost
- Charging time
For some products, maximum capacity is not the goal.
Instead, the goal may be: The highest practical energy capacity within a specific size and weight limit.
Nuranu can optimize battery configuration based on your product’s physical constraints.
High Energy Density Battery Solutions
When battery space is limited, cell selection becomes particularly important.
Nuranu can evaluate:
- Cell dimensions
- Cell capacity
- Energy density
- Discharge capability
- Internal resistance
- Cycle life
- Operating temperature
The goal is to achieve an appropriate balance between: Capacity + Power + Size + Weight + Reliability
This is particularly important for:
- Cordless tools
- Vacuum cleaners
- Robotics
- Portable electronics
- Medical equipment
- Industrial devices
Custom Battery Capacity for Different Applications
Nuranu develops custom capacity battery packs for a wide range of products.
Power Tools
Custom capacity battery packs for:
Cordless drills
Impact drivers
Saws
Sanders
Outdoor power equipment
Higher capacity can be used when longer operating time is more important than minimum battery weight.
Vacuum Cleaners
Custom battery capacity solutions for:
Cordless vacuum cleaners
Stick vacuums
Handheld vacuums
Robot vacuum cleaners
Battery capacity can be optimized according to:
Cleaning runtime
Motor power
Battery compartment
Product weight
Robotics
Battery capacity is especially important for mobile robots.
Applications include:
Mobile robots
AGVs
AMRs
Autonomous equipment
Service robots
Nuranu can design battery packs around:
operating time, drive motor demand, peak loads, charging cycles andavailable space
Medical Devices
For suitable portable medical devices, battery capacity can be optimized around:
Voltage
Capacity
Size
Runtime
Protection requirements
Industrial Equipment
Custom battery packs for:
Portable instruments
Inspection equipment
Monitoring systems
Industrial electronics
Mobile equipment
IoT & Smart Devices
For connected devices, capacity can be optimized around:
Standby time
Active operating time
Communication frequency
Device size
Battery replacement interval
Custom Capacity by Battery Chemistry
Nuranu supports different lithium battery chemistries depending on application requirements.
Lithium-Ion Battery Packs
Lithium-ion cells are widely used when customers require:
- High energy density
- Compact size
- Good power capability
- Flexible battery configurations
Common applications include:
- Power tools
- Vacuum cleaners
- Robotics
- Portable equipment
- Consumer electronics
LiFePO4 Battery Packs
LiFePO4 batteries are often considered for applications that prioritize:
- Long cycle life
- Thermal stability
- Safety
- Durable operation
Applications can include:
- Energy storage
- Industrial equipment
- Portable power
- Backup systems
Lithium Polymer Battery Packs
Lithium polymer cells can be useful when the battery must fit into a customized or space-constrained enclosure.
Advantages can include:
- Flexible form factors
- Low-profile designs
- Lightweight construction
Applications include:
- IoT devices
- Portable electronics
- Wearable products
- Compact equipment
Custom Capacity and Discharge Current
A battery with high Ah capacity may not necessarily provide enough current for a high-power application.
Nuranu evaluates both:
Capacity
How much energy the battery can store.
Discharge Current
How much current the battery can safely provide.
For products such as:
- Power tools
- Motors
- Robotics
- Pumps
- High-power equipment
peak and continuous current requirements can be particularly important.
Battery cell selection must therefore consider both capacity and discharge performance.
Custom BMS for Capacity Battery Packs
The BMS should be matched to the battery’s:
- Series configuration
- Current requirements
- Cell chemistry
- Charging requirements
- Protection requirements
Depending on the application, the BMS can provide:
- Overcharge protection
- Over-discharge protection
- Over-current protection
- Short-circuit protection
- Temperature monitoring
- Cell balancing
Advanced battery systems may also support communication and battery monitoring.
Custom Capacity Battery Enclosure
Increasing capacity often means adding cells.
But the battery still needs to fit inside the customer’s product.
Nuranu can optimize:
- Cell arrangement
- PCB location
- Cable routing
- Connector position
- Battery enclosure
- Mounting structure
This allows the battery capacity to be optimized within the available installation area.
Runtime Optimization
Battery runtime depends on several variables.
Important factors include:
- Battery energy
- Device power consumption
- Motor efficiency
- Electronics efficiency
- Operating mode
- Temperature
- Battery age
A simple theoretical estimate is:
Runtime ≈ Battery Energy ÷ Device Power
For example:
- Battery: 200Wh
- Device consumption: 100W
- Estimated runtime: ≈ 2 hours
Real-world runtime may be lower because of conversion losses, operating conditions, cutoff limits, and changing power consumption.
Nuranu can use your actual product specifications to develop a more appropriate capacity target.
Custom Capacity Battery Pack Design Process
Step 1 — Define the Runtime Target
Tell us how long your product needs to operate.
For example:
- 30 minutes
- 1 hour
- 4 hours
- 8 hours
- Custom runtime
Step 2 — Determine Power Consumption
We evaluate:
- Nominal power
- Continuous power
- Peak power
- Current demand
Step 3 — Calculate Required Energy
The required energy is estimated from:
- Power consumption
- Runtime
- System efficiency
- Usable battery range
Step 4 — Select Battery Cells
Cell selection considers:
- Capacity
- Discharge current
- Energy density
- Size
- Weight
- Cycle life
Step 5 — Determine Series / Parallel Configuration
The battery configuration is optimized to achieve the required:
- Voltage
- Capacity
- Current
- Physical dimensions
Step 6 — Design the BMS
The BMS is matched to the battery configuration and application.
Step 7 — Develop a Prototype
Samples are manufactured for:
- Capacity testing
- Runtime testing
- Charging validation
- Product compatibility
Step 8 — Production
After approval, the battery moves into OEM mass production.
Custom Battery Capacity Testing
Nuranu can perform appropriate battery testing during development and production.
Capacity Testing
- Battery capacity
- Energy output
- Charge/discharge performance
Electrical Testing
- Voltage
- Current
- Internal resistance
- Charging performance
BMS Testing
- Overcharge protection
- Over-discharge protection
- Over-current protection
- Short-circuit protection
- Temperature protection
Testing requirements depend on the battery design and final application.
Prototype Custom Capacity Battery Packs
Prototype samples allow customers to evaluate:
- Actual runtime
- Physical fit
- Battery weight
- Charging performance
- Product compatibility
- BMS behavior
Nuranu can then make design adjustments before moving into larger production quantities.
OEM / ODM Custom Capacity Battery Manufacturing
Nuranu provides end-to-end OEM/ODM battery manufacturing.
Runtime Requirement
↓
Power Analysis
↓
Energy Calculation
↓
Cell Selection
↓
Series / Parallel Configuration
↓
BMS Design
↓
Prototype
↓
Testing
↓
Customer Approval
↓
Mass Production
This gives customers a single manufacturing partner throughout the battery development process.
Why Choose Nuranu Battery?
Application-Based Battery Design
We don't simply select a battery based on an Ah number. We consider the complete application.
Flexible Capacity Configuration
Battery capacity can be optimized through: cell selection, parallel configuration, battery dimensions and chemistry selection.
Engineering Support
If you don't know the exact capacity required, our engineers can evaluate your: product power, runtime target, voltage, current and available space.
Prototype to Mass Production
Nuranu supports: prototype battery packs, engineering samples, pilot production and OEM mass production.
Custom BMS Integration
Protection and monitoring functions can be integrated according to application requirements.
What Information Do We Need?
For a custom capacity battery quote, provide:
| Requirement | Example |
|---|---|
| Battery voltage | 14.8V |
| Required capacity | 10Ah |
| Application | Cordless equipment |
| Runtime | 2 hours |
| Continuous current | 10A |
| Peak current | 20A |
| Maximum dimensions | 180 × 80 × 45 mm |
| Battery chemistry | Li-ion |
| Connector | Existing connector |
| BMS | Required |
| Quantity | 1,000 pcs |
If you don’t know the required Ah rating, simply provide the product’s:
- Power consumption
- Required runtime
- Voltage
- Maximum battery dimensions
Nuranu can help evaluate the required battery capacity.
Custom Capacity Battery Pack FAQ
What is a custom capacity battery pack?
A custom capacity battery pack is a rechargeable battery designed to provide a specific amount of electrical energy according to the product’s voltage, runtime, current, and physical requirements.
Can you customize battery capacity in Ah?
Yes. Battery capacity can be customized by selecting suitable cells and configuring them in parallel according to the required capacity and current.
Can you make a high-capacity lithium battery pack?
Yes. Nuranu can develop high-capacity lithium battery packs by optimizing cell selection and series/parallel configuration within the product’s size, weight, voltage, and current requirements.
How do I calculate the battery capacity I need?
A basic approach is to estimate required energy from power consumption and operating time:
Energy ≈ Power × Runtime
The final battery capacity should then account for voltage, efficiency, usable capacity, operating conditions, and other system requirements.
What is the difference between Ah and Wh?
Ah describes electrical charge capacity, while Wh represents energy and incorporates voltage.
A simplified relationship is:
Wh ≈ V × Ah
Can you customize both voltage and capacity?
Yes. Nuranu can design voltage and capacity together by selecting the appropriate series and parallel cell configuration.
Can you make a battery for a specific runtime?
Yes. Runtime is one of the key parameters used during custom battery design.
Provide the product’s approximate power consumption and required operating time, and our engineers can evaluate the battery capacity required.
Can you customize battery capacity without changing the voltage?
Yes. Capacity can often be increased by adding cells in parallel while maintaining the same series configuration and nominal voltage, provided the resulting pack remains compatible with the product.
Can a higher-capacity battery damage my device?
A higher-capacity battery does not automatically mean a higher voltage. However, the complete battery system must remain compatible with the product’s voltage, current, charging system, BMS, physical dimensions, and electrical requirements.
Can you develop a custom capacity battery from an existing battery?
Yes. An existing battery can provide useful information about voltage, capacity, cell configuration, dimensions, connectors, and BMS requirements.
Can you manufacture custom capacity batteries in bulk?
Yes. Nuranu supports prototype development, pilot production, and OEM mass manufacturing.
Need a Battery With a Specific Capacity?
Tell us your required Ah, Wh, runtime, voltage, current, or battery dimensions. If you don’t know the exact capacity you need, send us your product specifications and our engineers can help evaluate a suitable battery configuration.
