External Battery Classic 2, for iPhone 4/4S with 4000mAh, Mobile Power

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Model:KAYO Classic 2
Certification: UL,CE, MFI,FCC, UN38.3
Capable:Apple certificate
Minimum Order:200PCS
Brief Description:iPhone 4/4S external battery, with 1700mah. Past MFI Certificate, MFI Certified external battery for iPhone 4/4S

Wondar Liu

  • Product Details

Basic Specification


Detail Description

  • MFI Certified backup Battery for iPhone 4 and iPhone 4S


    Product Specification

    Name: KAYO Classic2 backup Battery (4000mAh)

    Size: L127.5×W61×T19.8mm

    Weight: 135g

    Input Voltage/Current: 5.0-5.5V / 500-1000mA

    Output Voltage/Current: 5.0V /500mA

    Capacity: Polymer lithium ion battery: 4000mAh

    Product Compatibility: iPhone 4                                      

    Charging Time: about 7 hours/9 hours

    Standby Time: 650 hours/850 hours

    Speaking Time: 12hours/15hours on 3G; 30 hours/35 hours on 2G

    Internet Use: 12hours/15hours on 3G; 21hours/25hours on Wi-Fi

    Audio Play Time: about 72hours/85hours

    Video Play Time: about 20hours/25hours



    Product List

    KAYO Classic2 External Battery

    USB---mini USB cable

    User Manual


    Product Features

    Made for iPhone Certification

    The battery and protecting jacket can freely combine with each other, which can perfectly solve the signal problem

    Unique design of power supply

    Super high capacity:3000mAh\4000mAh

    Unique design of appearance and structure

    Intelligent LED power indicator


    Information Transmission

    The product has the function of data transmission and it can link PC and iTunes synchronously.


    How to charge iPhone 4 with Kayo external battery?

    First, put the iPhone 4 mobile phone into the protecting jacket and exert to insert buckle tightly when the entirety gently slide into the slot;

    Press the button in the lower part of the external battery’s back for 3 seconds and then release the button, start up external battery to charge iPhone 4;

    In the process of charging, if you press the button in the lower part of the back for 3 seconds and then release the button again, it will finish charging for iPhone 4.


    How to charge KAYO Classic2 external battery?

    Use the data line attached with the external battery and insert external battery into the USB interface of the computer, then external battery can be charged;

    Or the user can connect the external battery to the original charger of iPhone 4 through data line, in this way the external battery can also be charged;

    If the external battery and iPhone 4 are connected to external power supply at the same time, the iPhone 4 will be charged first. After mobile phone has been fully charged, the external battery will be charged automatically.

    iPa Class II 4

    LED Indicator Instructions

    Indicator A shows that the external battery is charging; in the conditions that the external battery isn’t connected to the mobile phone and external power supply and press the button in the lower part of the back for 3 seconds, when indicator A is green, it shows that more than 90% of the battery capacity has been charged; when indicator A is orange, it shows 60-90% of the battery capacity has been charged; when indicator A is red, it shows that 30-60% of the battery capacity has been charged; when indicator A twinkles green, it shows less than 30% of the battery has been charged and the external battery should be charged; when the external battery is connected to external power supply, indicator A shows green, which means the external battery is be charged now, when indicator A turns green, it means external battery has been charged full.  

    Indicator B shows the state that iPhone 4 is charged by external battery, when the external battery is connected to iPhone 4, press the button in the lower part of the back for 3 seconds and then release the button, indicator B is on. Red shows that iPhone 4 is charging and green shows iPhone 4 has been charged full;

    Note: when the external battery is connected to iPhone 4, press the button in the lower part of the back for 3 seconds and then release the button. When indicator A twinkles red, it shows the quantity of electricity is low, so the external battery should be charged first and then be used.



    Certificate approval with CE, FCC, UL and RoHS from SGS


    After-sales Service Commitment

    One year warranty   National-wide warranty



    This product has been underwritten by P.I.C.C.



    1. Please read the user manual carefully before using the product.

    2. For its better performance, please fully charge the product before use it.

    3. The product should be exposure into the cool and dry place without using for a long time. Make sure to charge the product once no more than three months.



    1. Do not place the product with sharp, hard or metal components; do not impact and fell the product or the product will probably be damaged or scratched;

    2. Do not put this product in the damp environment or put it into water or any other liquids;

    3. Do not place the product into high temperature environment as exposing with sunlight, getting close to combustion source or putting into such heating container as oven, or it will have the danger of explosion;

    4. Please do not assemble, repair or replace the components of this product by yourself.

    5. Please do not let children use this product alone, inappropriate use might hurt them;

    6. Please do not keep use this product if it is damaged, waterlogged, distorted or broken.

    7. If this product is damaged, please contact with the dealer and communicate the maintenance affairs;

    8. Kayo will not take responsibility if this product is damaged not because of quality, including the above situations.

    9. The insurance coverage of this product is determined by PICC. The user may also not get insurance indemnity in above situations;

    10. This products contains polymer lithium ion battery, when it is worn out and needed to be scrapped, the user should follow the local provisions of laws and regulations and should not throw it away randomly.


Additional Information

Payment TermsT/T, L/C, Others
Minimum Order200PCS
Lead Time / Delivery Time15 Day(s)
Sample AvailableYES Ask For Sample
FOB PortHong Kong
Loading InfoBy Courier, UPS and so on
Packing InfoGift box, Standard export package. Less than 10kg/ctnCTN size: 425*355*175mm QTY/CTN: 40pcs
Target Market(s)Hong Kong/ Macao/ Taiwan, Japan & Korea, Mainland China, North America, Western & Southern Europe

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