GLOBAL BATTERY SUPPORTFAST ENGINEERING RESPONSEOEM / ODM FACTORY SUPPORT
Custom Lithium Battery Manufacturer

Battery Products
Engineered Around
Your Device.

Explore lithium polymer cells, 18650 / 21700 batteries, custom battery packs and LiFePO4 solutions. Customize voltage, capacity, dimensions, PCM/BMS, wires, connectors and labeling for your application.

Explore Products → Start a Custom Project
Custom Size & Shape PCM / BMS Integration Sample Support Certification Support
Find the right battery faster Start with your product requirements.
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Product Families

Explore Our Battery Products

Explore KRL battery families by chemistry, form factor and application, then share your target specifications for engineering evaluation.

01 · LIPO
KRL Li-POLYMER

Lithium Polymer Batteries

Thin, lightweight pouch cells for compact products, wearables, medical devices, GPS trackers and consumer electronics.

View LiPo Batteries →
02 · LI-ION

18650 / 21700 Batteries

Cylindrical lithium-ion cells and packs for products requiring stable output, stronger structure and scalable capacity.

View Cylindrical Batteries →
03 · CUSTOM PACK
KRL

Custom Battery Packs

Complete packs with customized voltage, capacity, PCM/BMS, wiring, connectors, insulation, housing, labels and packaging.

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04 · LiFePO4
KRLLiFePO4

LiFePO4 Battery Packs

Long-cycle, safety-focused lithium iron phosphate packs for portable power, backup, industrial and specialized equipment.

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Featured Application

Curved Battery Solutions
for Smart Rings

Explore curved lithium polymer cells designed around the space, shape and integration requirements of smart rings.

Curved Form Factor Ultra-Compact Design Custom Radius & Dimensions Prototype Support
Discuss a Smart Ring Project →
Product Finder

Browse Standard & Customizable Models

Filter by battery family or search by model and application to find the right starting point for your project.

⌕
Sodium Ion
Sodium-ion Battery Pack

12V 20Ah Sodium-ion Battery Pack

Voltage12V
Capacity20Ah / 240Wh
IntegrationRS485 BMS
ApplicationSolar / Smart Locker
View on Alibaba ↗Request Quote
Sodium Ion
Sodium-ion Starting Battery

12V High-CCA Sodium-ion Starting Battery

Voltage12V
Starting Power1400+ CCA
PerformanceLow Temperature
ServiceOEM / ODM
View on Alibaba ↗Request Quote
Customizable
KRL Li-POLYMER
Lithium Polymer Battery

Ultra-Thin LiPo Cell

Voltage3.7V / 3.8V
FormThin Pouch
CapacityPer Project
ApplicationCompact Devices
Request SpecificationsRequest Quote
Sample Support
KRL Li-POLYMER
Lithium Polymer Battery

Standard Pouch LiPo Cell

Voltage3.7V
FormPouch Cell
SizeMultiple Options
ApplicationGPS / IoT
Request SpecificationsRequest Quote
OEM / ODM
KRL
Custom Battery Pack

Integrated Device Battery Pack

VoltageCustom
ProtectionPCM / BMS
InterfaceCustom Connector
HousingOptional
Request SpecificationsRequest Quote
Project-Based
KRL
Custom Battery Pack

Compact Electronics Battery Pack

Cell TypeLiPo / Li-ion
Wire LengthCustom
LabelPrivate Label
ApplicationIoT / POS
Request SpecificationsRequest Quote
Long Cycle
KRL
LiFePO4 Battery Pack

LiFePO4 Power Module

VoltagePer Project
ProtectionBMS Available
StructureCustom Pack
ApplicationIndustrial / Backup
Request SpecificationsRequest Quote
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Browse by Application

Battery Solutions for Your Industry

Explore battery solutions by device and industry, from smart wearables to medical, IoT, mobility and portable electronics.

01
◯

Wearables & Smart Rings

Compact, lightweight and curved battery solutions for products where every millimeter matters.

Explore solution →
02
✚

Medical & Beauty Devices

Custom cells and packs designed around portability, stable output and product integration.

Explore solution →
03
⌖

GPS, Trackers & IoT

Space-efficient battery options for connected devices, sensors, trackers and smart terminals.

Explore solution →
04
⌂

Smart Home & Security

Battery packs for smart locks, alarms, access control, sensors and connected home products.

Explore solution →
05
⚙

Power Tools & Mobility

Cylindrical cells and custom packs for products that need stronger output and durable structure.

Explore solution →
06
▣

Portable Electronics

Flexible battery integration for speakers, handheld devices, scanners, POS and consumer products.

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Custom Engineering

From Device Requirements to Mass Production

KRL supports the complete development path from product requirements and cell selection to prototype validation and stable production.

STEP 01
▤

Send Requirements

Voltage, capacity, maximum dimensions, working current, connector, quantity and target market.

STEP 02
⌁

Engineering Evaluation

Battery type, cell layout, PCM/BMS, protection, structural fit and integration are reviewed.

STEP 03
◇

Prototype & Validation

Prepare samples for fit, charging, runtime and safety-related testing before mass production.

STEP 04
▦

Production & Delivery

Finalize materials, labeling, packaging, quality checks and production according to the approved sample.

↔Dimensions & Shape
⚡Voltage & Capacity
▥PCM / BMS
⌁Wire & Connector
▰Housing & Label
✓Testing Support
Factory & Quality

Manufacturing and Quality Control at Every Step.

Integrated production, assembly, aging tests and quality inspection support reliable custom battery manufacturing.

1
Incoming Cell & Material InspectionMaterials and cells are checked against approved specifications before assembly.
2
PCM / BMS & Pack AssemblyProtection circuits, wiring and pack structures are assembled to the approved design.
3
Electrical & Safety TestingElectrical performance and safety-related items are tested for the target application.
4
Sample-to-Production ConsistencyApproved samples, BOM details and inspection criteria support stable repeat production.
View Factory & Quality →
Start Your Battery Project

Need a Battery Built Around Your Product?

Send the key parameters or a device drawing. Our engineering team will review the electrical, mechanical and certification requirements.

Voltage & capacity matching Size and structure review PCM / BMS selection Wire and connector matching
Tell Us About Your Requirements