Send Message
Home Products18650 Battery Pack

300Wh Portable Power Source

I'm Online Chat Now

300Wh Portable Power Source

300Wh Portable Power Source
300Wh Portable Power Source 300Wh Portable Power Source 300Wh Portable Power Source 300Wh Portable Power Source 300Wh Portable Power Source

Large Image :  300Wh Portable Power Source

Product Details:
Brand Name: KAYO
Certification: UN38.3, MSDS, CE, ROSH, CB, IEC62133
Model Number: Portable-Power-Supply-0537
Payment & Shipping Terms:
Minimum Order Quantity: 10 packs
Price: Negotiable
Packaging Details: One pcs in a carton box
Delivery Time: 20
Payment Terms: 30% before production,70% before delivery
Supply Ability: 2000 packs per month

300Wh Portable Power Source

Place Of Origin: Shenzhen China Application: Emergency Mobile Energy Storage Power Supply
Charge Method: CC/CV DC Input: 12V-2A
Protection: Over-charge, Over-current, Over-Discharge, Short Circuit, High Temperature Cell: Samsung Lithium Ion Battery
Cycle Life: 1000 Times OEM/ODM: Acceptable
Battery Type: Rechargeable Lithium Battery Packs Weight: 7.5 Kg
Key Words 1: Portable Charging Station Certificate: MSDS, ROHS, IEC62133, CB, UN38.3, KC
Warranty: 12 Month Working Temperature: -20℃ ~60℃
Key Words 3: Portable Power Bank Discharge Current: Within 1C Rate
Storage Humidity: 65±20% RH Dimension: 390*250*290 Mm
High Light:

300Wh Portable Power Source


ROSH Portable Power Source


300Wh portable charging station


Custom Made Portable Power Supply 300Wh PORTABLE POWER SOURCE with Samsung Cells


Product Application

The model battery can be replaced for:



Starting power supply, Poartable power supply, emergency power supply, Power Bank



Product Specification




Battery capacity 285600mah


Weight: 7.5 kg


Dimension: 390 * 250 * 290


DC input: 15v-2a (supporting 12v-24v)


Charging output port: 12v-12a


AC output: 220 v-3a, 50 Hz, continuous discharge 1000W, peak discharge 1500W, AC rated output energy 200Wh


USB output: 2 * 5V = 2.4a (qc3.0)


Battery: lithium ion Rechargeable battery pack


Number of cycles: > = 800


Working temperature: -10-40 degrees


Charging temperature: 0-40 degrees


Protection system: overcharge protection, over discharge protection, over current protection, over temperature protection, short circuit protection and over-voltage protection


Warranty: 1 year


Certificate: UN38.3 MSDS RoHS



[function description of operation surface]


Power: press the power key for 2 seconds to turn on and off


DC switch: switch on / switch off


USB switch: switch on / switch off


AC switch: switch on / switch off


Input: DC input charging


Indicator: charging indicator


Input W: input power


Output W: output power


Percentage: percentage of electricity


DC: DC working indicator


USB:USB Work indicator


AC: AC work indicator


Red triangle type: flashing indicates high temperature



[precautions for use]


1: When the battery temperature reaches 55 ℃ after discharge, the device is prohibited from charging. After 1 hour of static charging, it is normal to charge (the time depends on the local temperature)


2: When the power on / off key is stopped, please press and hold the power key to turn off the power


3: DC USB AC indicates that the output port is on, and the corresponding device can be powered


4: When not using the power output port, please press 567 key or power key to turn off the power to save power


5: Low temperature may affect the battery capacity of the product. The product can be charged in the temperature range of 0 ℃ - 40 ℃, and supply power to the equipment in the temperature range of - 20 ℃ to 60 ℃


6: For the first time, it is recommended to fully charge the battery to avoid the inconvenience caused by insufficient power


300Wh Portable Power Source 0




300Wh Portable Power Source 1



Product Features



  • Smaller size.
  • Pollution free.
  • Lighter weight.
  • Longer cycle life.
  • High performance.
  • No memory effect.
  • High energy density.
  • High Discharge Voltage.
  • lower internal resistance.
  • Outstanding Stable discharge characteristics.


  • OEM&ODM orders are acceptable.
  • Competitive price with fine quality.
  • Powerful production capablicity and Short Lead Time.


  • BMS&PCM function: Over-charge protection, Over-Discharge protection, Over-current protection, Short Circuit protection, High Temperature protection, Balance Charge/Discharge protection, Communication protocol function, Battery Power indicator.


Warnings & Attentions


To ensure to use battery properly, please read the requirements carefully
Dispose Method:
Do not dispose of the battery in fire or expose to the heat.
Do not connect battery in charger or equipment with reverse positive and negative terminals.
Do not short circuit the battery.
Do not make battery in physical shock or vibration.
Do not disassemble battery.
Do not immerse battery in water or get it wet.
Do not use batteries mixed with other different type, model.
Keep battery away from children.
Battery must be charged in appropriate charger.
Do not use modified or damaged charger.
Do not use unqualified with the specified charger.
Do not discharge battery with surpassing current of specified.
Do not discharge battery when the ambient temperature is out of the specified.


Packaging & Shipping

One pc in a PE bag, and then in a standard export carton or Custom-made Package.


Delivery Methods:
① By express UPS/DHL/FEDEX/TNT (It takes 3-5 days to arrive).
② By airfreight (It takes about 3~7 days to arrive) .
③ By sea shipment (It takes about 35 days to arrive).


Delivery Time: 3-5 days for samples, 8-20 days for mass production, depend on the QTY.


Company Information
Established Year: 1999 (More than 20 years)
Office: ShenZhen, GuangDong China
Production: DongGuan,GuangDong China
Type of company: Sino-Japanese joint venture
R&D members: 46
Production employee: 500 (full-time)
Activity: R&D Design, Manufacture,and Sales of custom batteries
Certificate: ISO 9001:2008, ISO14000: 2004,UL, CB, KC, PSE, 3C, CE, FCC, UN38.3, RoHS
Mainly Products: Lithium Polymer Battery, Lithium Ion Battery, LiFePO4 battery,NI-MH battery and relative battery pack assembly
Mainly Customers: Honeywell, Ansmann, Philips, General Electronics, NTT, Huawei, Energizer, Bosch etc.

We provide one-stop battery power solution, including cell selection, battery pack design, PCM/BMS design, battery pack assembly, OEM Packing and after sales service. 

1. Q: What products do you offer?
A:We mainly lithium polymer battery, li polymer battery, lithium ion polymer battery, li fe po battery, lithium lifepo4, lifepo4 lithium battery, 18650 lithium ion battery, 18650 li battery, 18650 battery pack, 18650 lithium rechargeable battery, lifepo4 battery pack, lithium ion solar battery, lithium solar batteries, golf cart lithium battery, motorcycle lithium battery, lithium ion rv battery, marine lithium battery, ups lithium battery, lithium ion trolling motor battery, lithium ion boat battery, electric scooter lithium battery, lithium battery for ebike, lithium ion forklift battery, power wheels lithium battery, lithium batteries for solar panels, lithium ion deep cycle battery, lithium ion phosphate batteries, cobalt lithium ion battery, rechargeable lithium battery packs, lion energy lithium batteries, iron lithium battery, liion battery pack, custom lithium battery packs, custom lithium polymer battery and custom battery pack solutions for Telecom, Medical instrument, Military equipment and Industry Lighting.
2. Q: Can you accept OEM and ODM Service for custom battery pack?
A: Yes, we can produce the custom made battery packs as every of clients requirements. Such as the cell brands, capacity, voltage, discharge performance, battery shape, battery size, connectors, enclosures and the package, all can be customized.

3. Q: How do you control your product quality.
A: We take ISO9001 quality system into our production and all the production are standardized under 7S. Absorbed the advanced management experiences from our Japan team in R & D, Production and Quality control, KAYO has been implementing the strictest quality control system and integrated quality and service traceability system. All the product are of traceability from the material input to finished products delivery, Inspection and testing are implement during the whole production steps. and the Comprehensive test will be taken before the delivery;


4. Q: What certificates do you have?

A: ISO9001 quality system, IATF16949 Automotive Industry Management System, ISO140001 Environmental System, and GB/T29490-2013 System. And most of the products have passed the UL, UN38.3, ROSH, CE, CB, BIS, KC, MSDS certificates.


5. Q: What is your warranty?

A:We offer 2 years warranty for all our battery pack. All the KAYO products are insured by the Third Party PICC PROPERTY AND CASUALTY COMPANY LIMITED. the best service are assured


6. Q: What's your payment term?
A: We can accept T/T and L/C for standard order; West Union and T/T for samples are acceptable;


7. Q. Do you have any MOQ limit?

A: Generally we request no MOQ limit to support every project of our customers if the model battery is assembled with 18650 lithium Rechargeable battery. And if the model batteries are the custom-made Lithium Ion Polymer batteries, then it will depended by the battery power and it will generally be requiested with 3000 pcs per model.

8. Q. How long will be the Lead time?
A: it depends on order quantity. Usually the delivery date for samples: 3~5 days, for mass production: 5~25 days,


9. Q. How do you ship the goods and how long does it take to arrive?
A: The goods are generally shipped by Express Delivery (UPS/DHL/TNT/FEDEX etc). and we can also ship the batteries by Air Cargo or by sea. It takes 3-5 days by Express. And it will take about 28 days by sea.


10. Q. How to proceed with an order?
A: Step 1, let us know your requirements such as voltage, capacity, continuous discharge current, peak discharge current,work condintion temperature and application. Step 2, We quote according to your requirements. Step 3,You confirms the prices and samples ; Step 4, You place a formal order as your need QTY. Step 5, We provide the proforma invoice according to your order and you pay 30% deposit of the order and we arrange the production; Step 6, when the goods are ready and we will inform you finish the balance payment of the order and we ship out the goods as soon as the payment is confirmed.

Contact Details
Unitech Energy System Limited

Contact Person: Mrs. Olinda

Tel: +86-181 2856 1764

Fax: 86-755-23449332

Send your inquiry directly to us (0 / 3000)