Welcome to SUNLY

deep cycle battery china

Sunly as a one of the best deep cycle battery manufacturers offers bulk and custom deep cycle battery options. No MOQ required

Featured Products

Supply Deep Cycle Battery China

with a self-owned deep-cycle lithium battery factory, Sunly as a deep-cycle battery supplier from china supplies deep cycle batteries in different voltages and capacity for clients worldwide at low deep cycle battery  costs.

Get the best deep cycle battery price now

Sunly as one of the best deep cycle lithium battery suppliers can offer a wide of deep cycle battery options based on your need either customization or standard type.

Fill Up Custom Built Lithium Battery Specification Form

Cannot Find Your Ideal Battery Pack?

Sunly as a  certified custom battery pack manufacturer delivers custom rechargeable battery pack services that fit customers’ lithium battery requirements and specifications, helping you build your own lithium battery packs no matter which country you’re in. 

Customization OptionsDetails
BMS Functions
  • Communication Protocol (SMBus, CAN)

  • Communication Protection

  • SOC Indicator

  • Current Detection

  • Abnormal Log

  • Self-Inspection

  • Using Time Record

Charge Management Options
  • Charging Over-Voltage Protection
  • Charging Over-Current Protection
  • Charging Over-Temperature Alarm/Protection
  • Charging Low-Temperature Alarm/Protection
  • Abnormal Voltage Gap Warning
  • Charging Short Circuit Alarm/Protection
  • Self-Balancing
Discharge Management
  • Discharging Over-Current Protection
  • Discharging Under-Voltage Protection
  • Battery No-Load Protection
  • Discharging Short Circuit Alarm/Protection
  • Discharging Over-temperature Alarm/Protection
  • Discharge Low-Temperature Alarm/Protection
Other Functions
  • Self-Heating Technology for Low Temperature
  • Ultra-Low Power Consumption
  • Reverse Connection Protection
  • Self-Discharging in Fully Charged Storage
Customization OptionsDetails
Lithium Battery Shapes
  • Round lithium battery
  • Curved lithium battery
  • Thin lithium battery
Lithium Battery dimension
  • Customizable 
Lithium Battery Configuration
  • battery voltage
  • battery capacity
  • battery current rating
  • battery temperature
  • battery energy density
Performance Certification & Standard
  • GB/T182287
  • UL
  • CE
  • RO
  • UN38
  • MS
  • FCC
  • KC
Customization OptionsDetails
Lithium Battery Materials
  • PC
  • ABS+P
  • ABS
Lithium Battery Explosion Proof Strength
  • UL 
Lithium Battery Waterproof Grade
  • IPX
You-required Configuration
  • Styled Case
  • Heat Dissipation
  • Size & Weight 
  • Shock Resistance 
Customization OptionsDetails
Custom Lipo Battery PacksCompared to 18650 batteries, lithium polymer battery packs are lighter and can be made into a thin, flexible shape, making them ideal for use in portable electronic devices.
Custom LiFePO4 Battery PacksRechargeable LiFePO4 batteries are more stable, have a higher energy density, and can be discharged and recharged more times than their counterparts.
Custom 18650 Battery PacksOrder high-quality NiMH 18650 batteries including a higher energy density and a lower self-discharge rate, making them long-lasting power sources.
deep cycle lithium battery factory from china

Original Deep Cycle High Quality Battery

Sunly lithium ion deep cycle batteries are manufactured under the best manufacturing battery plant, with the battery certifications such as CE, ISO, ROHS, KC, PSE, and TISI. 

Safe
Rechargeable
Quiet
Easy to Use

China Best Deep Cycle Battery for Your Project

Sunly the best deep cycle battery supplier offers customized battery packs in the battery manufacturing industry, for different uses and applications. has designed, developed, and manufactured high-quality, reliable, custom battery packs of all chemistries that not only optimize performance but meet the requirements of OEM batteries partners. We specialize in the design and manufacturing of deep cycle rechargeable battery at the best lithium ion deep cycle battery price, with our technical expertise and chemistry knowledge it assures the safest and best match for your application.

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Customizable deep cycle battery technology

Sunly the best deep cycle battery supplier offers customized battery packs in the battery manufacturing industry, for different uses and applications. has designed, developed, and manufactured high-quality, reliable, custom battery packs of all chemistries that not only optimize performance but meet the requirements of OEM batteries partners. We specialize in the design and manufacturing of deep cycle rechargeable battery at the best lithium ion deep cycle battery price, with our technical expertise and chemistry knowledge it assures the safest and best match for your application.

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How it works

Easy Custom Lithium Battery Pack

Take a survey location

According to the customer's application scenario, we will provide lithium battery-related solutions or product requirements list.

Estimate your budget cost

After knowing the customer's procurement budget, operating costs, and other costs, we help customers provide the most reasonable lithium battery solution.

Develope your project

We provide whole solutions or specifications within 48 hours, from cell selection, circuit diagram, and structural design, to final product testing.​

Lauch prototype project

Welcome to sample requests, 3-days making samples, 7-days delivery out, and diversified products for customers to choose.

SAFETY is our top priotiry!
Choose well-known battery core brands. We developed our own battery management system (BMS) to achieve intelligent balance, high stability, high-precision detection and other multiple protection
Why Choose us

Why Buy Deep Cycle Batteries From China Factory

Work with sunly, you will get stable & safe products every time. You can focus on growing your business all the time.
a worker is operating the lithium ion battery making machine

Safe

Intelligently protect the battery, protect overcharge, over-discharge, overcurrent, overvoltage, temperature, etc. to ensure the safety of products.

Certified battery expert

Integrate three core links of energy storage lithium battery R&D and production, BMS R&D, and system integration.

ODM OEM Battery

The manufacturing capacity fully meets the diversified and individual needs of customers, and the rapid sample preparation.

24/7 Premium Support

Ensure our customers' success and business productivity – whether for on-site assistance, technical, or remote support.

a worker is operating the lithium ion battery making machine

Your reliable custom lithium ion battery pack manufacturer

The operation of the dual system and the combination of advanced battery testing equipment, Becoming a reliable portable power manufacturer, Sunly has passed the certifications including CE, ISO, ROHS,KC, PSE, TISI, BSMI and approval of many authoritative organizations at home and abroad, including US, UK, Australia, Canada, South Africa and more.

High quality 18650 battery pack
Custom made & built battery packs
Ensured 18650 battery safety
Competitive battery pack cost
Get in touch
Do not hesitate to contact us via the form below, we will reply to your message within 24 hours or sooner.

sales@sunlypower.com

+86 184 7633 0578

+86 769 80285025

INQUIRY NOW

Let's start your project