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Custom Sizes & Shapes
Flexible design for compact products
BMS / PCM Integration
Protection engineered for performance
Prototype to Mass Production
A clear path from samples to volume
Testing & Certification Support
Documentation for target markets
PRODUCT CATEGORIES
Explore Our Battery Product Categories
Browse lithium battery cells, battery packs, portable power and solar solutions, plus custom OEM/ODM options.
01
Cylindrical Lithium-ion Cells
18650 & 21700 Cells
Reliable cylindrical lithium-ion cells available in different capacities for power tools, portable electronics, battery packs and energy applications.
Explore Cells →
02
Lithium Polymer Batteries
Slim & Lightweight Pouch Cells
Compact lithium polymer pouch batteries available in various sizes and configurations for smart electronics, wearables and portable devices.
Explore LiPo Batteries →
03
Custom Lithium-ion Battery Packs
Application-Specific Battery Packs
Custom lithium-ion battery packs designed around your voltage, capacity, size, BMS, connector and application requirements.
Explore Battery Packs →
04
LiFePO4 Batteries
Long-Cycle Energy Solutions
LiFePO4 cells and battery packs designed for energy storage, lead-acid replacement and industrial power applications.
Explore LiFePO4 →
05
Sodium-ion Battery Packs
Power for Low-Temperature Applications
Sodium-ion battery solutions for selected outdoor, backup power and industrial applications, including demanding low-temperature environments.
Explore Sodium-ion →
06
Portable Power Stations
Portable & Backup Power
Portable power solutions for camping, RV travel, backup power, emergency situations and off-grid applications.
Explore Power Stations →
07
Solar Panels
Foldable Solar Charging
Portable and foldable solar panels designed for outdoor charging, portable power stations and off-grid energy applications.
Explore Solar Panels →
08
Smart Ring Batteries
Ultra-Thin Curved LiPo Batteries
Ultra-thin curved lithium polymer battery solutions designed for compact smart rings, wearable electronics and miniature devices.
Explore Smart Ring Batteries →
09
Custom Battery Solutions
OEM & ODM Battery Engineering
From battery selection and structural design to BMS integration, prototyping and production, KRL supports application-specific battery development.
Start Custom Project →
Need a Battery Designed for Your Project?
Tell us your application, voltage, capacity and quantity requirements. Our team can help you explore a suitable battery solution.
BATTERY APPLICATIONS
Discover how custom battery solutions support everything from smart wearables and medical electronics to automation and industrial equipment.
Smart Wearables
Compact battery solutions for smart rings, watches and wearable electronics.
Consumer Electronics
Lightweight and reliable power for everyday portable electronics.
Medical Devices
Custom battery solutions for portable medical and monitoring equipment.
Robotics & Automation
Custom power solutions for mobile robots, AGVs and automated systems.
Portable Power Stations
Battery solutions for portable energy and backup power systems.
Industrial Equipment
Durable battery solutions for demanding industrial equipment.
FROM IDEA TO PRODUCTION
A Clear Custom Battery Development Process
01
Requirement Analysis
Understand the application, voltage, capacity, size limits and performance targets.
02
Cell Selection
Select the right battery chemistry and cell format based on safety, lifecycle and cost goals.
03
Electrical & Structural Design
Design the PCM/BMS, wiring, connectors and pack structure to fit the product requirements.
04
Prototype Development
Build samples for functional verification, fitting tests and early performance evaluation.
05
Testing & Certification
Conduct performance, safety and reliability tests, with support for required certifications.
06
Mass Production
Move into stable production with quality control, inspection and delivery coordination.
OUR PRODUCTS
OUR PRODUCTS
Featured Products & Energy Solutions
Explore our lithium battery cells, custom battery packs, portable power stations and solar energy solutions for diverse applications.
CUSTOMIZABLE
Semi-Solid State Batteries
3.7V
330mAh
602030
Compact 6 × 20 × 30 mm pouch cell for hearing devices and space-constrained electronics.
CUSTOMIZABLE
Portable Power Stations
300W
256Wh
LiFePO4
Pure-sine-wave portable energy storage with MPPT and multiple AC, DC and USB outputs.
CUSTOMIZABLE
Solar Panels & Accessories
5W
5V
Type-C
Compact ETFE solar charger with a 2 m Type-C cable and adjustable wall-mount bracket.
Lithium-ion Cells
3.7V
2000mAh
18650
Rechargeable cylindrical lithium-ion cell with a source-listed NMC cathode and 500-cycle rating.
LiFePO4 Cells
3.2V
240Ah
LiFePO4
Large-format prismatic LiFePO4 cell for energy storage, UPS and electric-mobility integration.
CUSTOMIZABLE
Custom Battery Solutions
3.7V
16mAh
156525
Ultra-compact curved lithium-polymer pouch cell with flat tabs for smart-ring integration.
Custom Battery Solutions
7.4V
5000mAh
Type-C
Rechargeable smart-door-lock battery pack with integrated Type-C charging and a multi-contact terminal.
Manufacturing Process
Battery Manufacturing Process
From cell preparation to final packaging, our structured manufacturing process covers cell matching, welding, BMS integration, performance testing and final assembly, supporting consistent quality and reliable battery pack production.
01
Material Preparation
Preparing cells, components and materials for production.
02
Cell Sorting & Matching
Sorting and grouping battery cells for consistent pack performance.
03
Welding & Assembly
Connecting cells and assembling battery pack structures.
04
BMS / PCM Installation
Integrating battery management and protection systems.
05
Charging & Discharging Test
Performing charge and discharge testing during production.
06
Battery Aging Test
Running aging procedures to evaluate battery stability.
07
Final Inspection
Checking completed battery packs before packaging.
08
Packaging & Traceability
Packaging finished products with identification and traceability labels.
Quality Assurance
Quality Control at Every Step
From incoming material inspection to pre-shipment quality checks, our multi-stage testing and inspection procedures help ensure battery consistency, electrical safety, reliable performance and product traceability.
01
Incoming Material Inspection
Incoming cells, BMS components, connectors and cables are inspected before production.
Inspection Focus
Cell Appearance
Specifications
Material Verification
02
Cell Voltage & Internal Resistance Test
Cell voltage and internal resistance are measured to identify abnormal cells before assembly.
Inspection Focus
OCV
ACIR
Cell Screening
03
Cell K-Value & Consistency Test
Cell self-discharge characteristics and consistency are evaluated to support reliable cell matching.
Inspection Focus
K-Value
Self-Discharge
Cell Consistency
04
Welding & Connection Inspection
Weld points and electrical connections are inspected for quality and connection reliability.
Inspection Focus
Weld Quality
Connection Integrity
Visual Inspection
05
BMS Function & Protection Test
Battery management and protection functions are checked to verify electrical protection performance.
Inspection Focus
Overcharge
Over-Discharge
Overcurrent
Short Circuit
06
Charge / Discharge & Aging Verification
Battery packs undergo charge and discharge testing and aging verification to evaluate performance stability.
Inspection Focus
Capacity
Charge / Discharge
Aging
07
Final Safety & Performance Inspection
Completed battery packs are inspected for electrical performance, safety and functional reliability.
Inspection Focus
Voltage
Function
Electrical Safety
08
Pre-Shipment Sampling Inspection
Finished products are sampled and checked for appearance, functionality, labels and packaging before shipment.
Inspection Focus
OQC
Sampling Inspection
Traceability
QUALITY ASSURANCE & COMPLIANCE
Tested for Reliability.
Backed by Documentation.
Explore KRL Battery’s quality testing capabilities and supporting product-specific compliance documents, management system certificates, and innovation credentials.
UN 38.3
Transport Safety Test Report
IEC 62133-2
Battery Safety Test Report
CE
Certificate of Compliance
CB
IECEE CB Test Report
ISO 9001
Quality Management System
CCC
China Compulsory Certification
Certifications & Compliance Documents
Actual document previews — organized by testing, management and innovation.
Document scope, named applicant / manufacturer, report type and current validity differ by product and market. Preview images are for reference; full current files should be reviewed before claiming product certification.
View All 18 Credentials ↓
Battery Testing Capabilities
Clear testing categories to help buyers understand how battery quality is evaluated.
Capacity Test
Charge & discharge
Cycle Life
Repeated cycling
Charge Protection
Charge / discharge safety
Short-Circuit Test
Protective response
Temperature Test
Thermal evaluation
Drop & Vibration
Mechanical reliability
TESTING & EVALUATION
Battery Testing Laboratory
From performance evaluation to safety and mechanical reliability testing.
CUSTOM BATTERY SOLUTIONS
Solutions That Power Innovation
MANUFACTURING EXPERTISE
Your Custom Battery Manufacturing Partner
Integrated R&D, engineering, testing and manufacturing support for customized lithium battery projects.
Precision Equipment
Advanced manufacturing
Material Preparation
Stable and reliable supply
Critical Processes
Strict quality control
CUSTOM BATTERY SUPPORT
Frequently Asked Questions
① What information is required for a custom battery?
Voltage, capacity, dimensions, application, operating conditions, wires, connectors and certification requirements.
② Can the battery size and shape be customized?
Yes. KRL supports custom dimensions, shapes, wiring, connectors and housings for suitable projects.
③ Can you integrate BMS or PCM?
Yes. Protection design can be integrated according to cell chemistry, voltage and application requirements.
④ What is the minimum order quantity (MOQ)?
Minimum order quantities depend on the battery type, customization and production requirements. Share your target specifications and expected quantity so we can review feasibility and confirm an appropriate order plan.
⑤ How long does prototype development take?
Timing depends on the design complexity and testing scope. Contact KRL for a project-specific schedule.
⑥ What certifications are available?
Certification and test documentation requirements depend on the battery chemistry, application and destination market. Tell us which standards your project requires so we can review available documentation and any additional testing needed.
Need a Custom Battery Solution?
Share your project requirements with our engineering team. We’ll review your needs and prepare a suitable solution and quotation.
START YOUR CUSTOM BATTERY PROJECT
Tell Us What Your Product Needs
Share your voltage, capacity, dimensions, application and expected quantity. Our engineering team will review the requirements and prepare the next technical steps.
01
Engineering review
02
BMS, wiring & connector support
03
Prototype planning
04
Certification guidance
Your project information is handled as confidential technical data.
