Rechargeable 18650 & Lithium Polymer Battery Packs
ZERNE provides custom lithium battery solutions for OEM devices, including 18650 battery packs, rechargeable lithium polymer batteries, PCM/BMS integration, custom connectors, wire length, voltage, capacity and pack structure design.
Since 1998
Custom Size & Capacity
Fast Sample Support
Quality Assurance
Choose the Right Battery Type for Your Project
18650 Battery Pack
Best for devices that need stable power output, multi-cell pack design, and long cycle life.
Best For: Portable equipment, power tools, handheld devices, medical backup power
Key Advantage: Mature cylindrical cell structure with stable and consistent supply
Pack Design: Supports multi-cell series and parallel configurations
Custom Options: Voltage, capacity, BMS/PCM, connectors, and cable length available
Performance Benefit: Good cycle life and dependable power output for OEM applications
Rechargeable Lithium Polymer Battery
Best for compact devices that require a slim, lightweight, and custom-sized battery.
Best For: GPS trackers, wearables, IoT devices, heated products, medical devices, compact electronics
Key Advantage: Thin, lightweight, and space-saving battery design
Size Flexibility: Custom thickness, width, length, and shaped battery options available
Custom Options: Capacity, voltage, PCM/BMS, NTC, and connector customization supported
Performance Benefit: Ideal for limited internal space and portable smart devices
Custom
18650 Battery Packs
ZERNE provides custom 18650 battery packs with multi-cell design, stable output and high reliability for portable equipment, power tools, medical devices, scooters and more.
7.4V 1200mAh 18650 Battery Pack
7.4V 1800mAh 18650 Battery Pack
7.4V 2200mAh 18650 2S1P Pack
7.4V 2600mAh 18650 2S1P Pack
22.2V 1800mAh 18650 Battery Pack
22.2V 2600mAh 18650 6S1P Pack
Custom
Rechargeable Lithium Polymer Batteries
ZERNE offers custom LiPo batteries with various sizes, thicknesses and shapes for GPS trackers, wearables, IoT devices, medical electronics and other space-limited applications.
3.7V 80mAh Lithium Polymer Battery
3.7V 250mAh Lithium Polymer Battery
3.7V 300mAh Lithium Polymer Battery
3.7V 450mAh Lithium Polymer Battery
3.7V 600mAh Lithium Polymer Battery
3.7V 850mAh Lithium Polymer Battery
3.7V 1000mAh Lithium Polymer Battery
3.7V 1800mAh Lithium Polymer Battery
3.7V 3000mAh Lithium Polymer Battery
3.7V 10000mAh Lithium Polymer Battery
Battery Customization Built Around Your Device
Every OEM device has different space, runtime, power output and safety requirements. ZERNE provides custom lithium battery solutions based on your product structure, application scenario and electrical requirements — from battery cell selection to pack design, protection system, connector integration, sampling and mass production.
Battery Solutions for Smart, Portable and Safety -Critical Devices
Why OEM Customers Work With ZERNE
From battery cell selection to custom pack design, ZERNE supports OEM customers with rechargeable lithium battery solutions built around real device requirements.
Long-Term Manufacturing Experience
ZERNE has focused on lithium battery R&D and manufacturing since 1998, supporting OEM customers with rechargeable battery design, production and project development.
ODM/OEM Project Support
We support custom battery projects with flexible MOQ, fast sampling, technical feedback and export experience for overseas customers.
R&D and Manufacturing Base
ZERNE integrates R&D, battery pack design and production capability, supported by a 30,000㎡ manufacturing base for lithium battery development and delivery.
Certified Quality System
ZERNE supports international battery projects with ISO9001, ISO14001, ISO45001 quality management, strict production control, shipment inspection, BSCI certification, and global compliance documentation.
FAQ
18650 packs are ideal for stable power and high-capacity devices. LiPo batteries suit compact or irregular-shaped devices. Unsure? Share your device details and we’ll recommend the best solution.
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Can I charge an 18650 battery with an AA charger? Usually not if the charger is designed only for rechargeable AA batteries such as NiMH or NiCd. An 18650 is commonly a lithium-ion cell with different voltage, charging current and charge-termination requirements. This article explains why physical size does not prove charger compatibility, when a universal charger may support both AA and 18650 batteries, what specifications to check, and which warning signs should stop the charging process. It also covers protected cells, multi-cell packs and safe charger selection for OEM applications. -
A phone charger can supply power to a compatible 18650 battery charging circuit, but it should not be connected directly to a bare cell. To charge an 18650 battery safely, confirm the cell chemistry, series configuration, charging voltage, charging current, USB input type, protection system and charging port. This guide explains how to evaluate phone charger compatibility, why USB-C and fast-charging protocols do not replace a lithium-ion charger, and what OEM teams should validate when designing products with integrated 18650 charging. -
A USB powered 18650 charging circuit requires more than a USB cable or phone adapter. The system must match the 18650 cell chemistry, series configuration, charge voltage, charge current, protection system and thermal design. This guide explains how USB power works with single-cell and multi-cell 18650 packs, why USB-C PD does not replace a battery charger, how to evaluate charging modules, and what OEM teams should validate before production. -
This article explains how to charge a Li-ion battery without a dedicated charger and why most improvised methods are unsafe. A power adapter, USB port or phone charger cannot automatically replace a lithium battery charging circuit. The safest options are to use a compatible charger, charge the battery through an approved device charging system, obtain a suitable replacement charger or ask a qualified battery professional for help. The guide also covers direct-wire risks, battery inspection, BMS protection, temperature concerns and situations where charging should be avoided completely.
Get a Custom Battery Quote
Not sure which battery fits your project? Send us your device space, runtime target and application. Our team will recommend a suitable battery solution.
Mob：+86-13724662111
E-mail：info@zn-battery.com
