power bank 4000 mah power bank external battery

 Specification:

power bank 4000 mah power bank external battery and high conversion efficiency s for cell mobile phone

Advantages of Battery  power bank 4000 mah power bank external battery

1.Best compatibility:

This external batterycan charge the original batteries of IPHONE, IPAD, SAMSUNG, HTC ,NOKIA .
2.Feature it owns

The external battery with Auto intelligent power indicator,it can show how much capacity it remaining .

3.Good material

The external battery material is plastic , quite classic and great texture.
4.Small body and big capacity

Only 106g, but 4000mAh ,great emergency choice.
5 . Great after-sale service

The external battery  with Great after-sale service. Instant reply for any question.

One year warranty.
6. Competitive price

The battery cell of external battery, that is the core part for power bank, is made by all ourselves---a professional battery manufacturer in Dongguan, China, 

thus the cost of power bank will go down in a big deal. 

7. High quality

Our company has passed the assessment of ISO9001=2008, and control strictly conforms to the requirements of ISO. 

From incoming materials to goods to shipment, we all have quality planning, quality control and quality guarantee to ensure high quality.
8. Prompt delivery

The delivery date for power bank is around 5days. OEM &ODM welcome.

High Quality of

A. Because of  our 8 years experience in researching and manufacturing battery cells.

15 Manufacture engineers
 8 Quality engineers(Average 6 years experience)
18 Project engineers(Average 6 years experience)
17 Tool design engineers(Average 6 years experience)

B.Because of charger for laptop strict quality control

IQC of incoming materials testing
Capacity testing
Inner resistance testing
IC testing
IPQC testing on production line
Charge-discharging testing
Aging testing
FQC final production testing
OQC shipment testing

Packing Details

Shipment Details

  Factory Details:

Certificates:

H.K. Fair:

Samples costs and shipping cost paid by the buyer.

Time: 1-2 day.
Sample time with logo: 2-3 days