Mobile Power Bank 20000MAH

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China Main Port
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TT or LC
Min Order Qty:
5000 Pieces pc
Supply Capability:
200000 Pieces per Month pc/month

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Product Description:

Specifications:

 

*Internal battery type: 3.7V Lithium battery

*Capacity: 20000mAh

*Input: 5V-1000mAh

*Output one: 5V-1000mAh

*Output two: 5V- 2100mAh

*Dimension: 150*72*25mm

*Weight: 225g

*Color: Black, White,pink,blue or as be required

*Working time: 15hrs

*Charging cycle:500 times

*Warranty period: one year

 

 Detailed features:

1). Built in-high-capacity Li-ion polymer battery, 20000mAh, to make sure 500 times above charging cycle.   With 4 LED indication.

2). Two USB output socket, can also charge iPhone, iPad, mobile phones(like Nokia, Blackbery, Mot

-o, Samsung, Sony Eriksson etc),PSP,GPS,Camera, etc. digital products

3). High standard safety protection design, including discharger, overload, short-circuit, lighting pro

-tection function

4). Intelligent hand control on-off switch to prevent power consumption

5),plastic casing make it more fashion and exquisite for mobile power bank 20000mah .

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Q:1000 square meters low voltage.36 volts lighting power supply with multiple transformers and wires
You must know the quantity and power of the lamp to determine the transformer
Q:Who knows how big transformers and lines the 36V transformer uses in lighting?
No matter how many volts the output / input voltage of the transformer is, the size and the amount of the core of the transformer, the wire diameter of the winding lead and the lead thickness must be determined by the transformer capacity. Example: input 220V, output 36V load is 36v/40w light bulb 6, so the primary needs 0.72, secondary use 1.81 diameter enameled wire winding system. The transformer capacity is about 250VA.
Q:What transformer can be used in a safety voltage lighting transformer?
220V/36V or 24V isolation transformer. Double winding, high and low voltage coils, not connected.
Q:The difference between lighting transformers and control transformers
A control transformer is a low voltage appliance, usually used as a power supply or part of a lighting for the control of electrical equipment such as machine tools. There are usually two different voltage outputs,
Q:How many A leakage protection switches are used in 5000VA lighting transformers?
According to the working principle of the protector, it can be divided into three kinds: voltage type, current type and pulse type. The voltage protection device is connected to the transformer neutral point and the ground, when the electric shock when the neutral point voltage offset to the real estate, in order to make the action to protect the power off, but because it is the protection of the transformer low voltage network, cannot be classified protection, so the power range is large, frequent moves, so has been eliminated. The pulse current protector is a sudden change in the phase and amplitude of the three-phase unbalanced leakage current when an electric shock occurs, which is used as an action signal, but also a dead time. The current type current leakage protector is widely used, so the protector of current type is mainly introduced below.
Q:What's the function of the lighting transformer?
In addition, can be rated power supply voltage of not more than 1000V AC circuit, as a machine tool and mechanical equipment control power, work lighting and signal light power supply, can also be used as a small power supply!
Q:The transformer zero line has broken, has the result to the household illumination circuit?
The zero line is connected to the transformer neutral point of transformer, three FireWire for its voltage is 220 volts, according to regulations, the total can not take the zero line fuse, switch, because once the zero line is disconnected, the rest of the line will no longer be a neutral line, into the use of electrical appliances connected to two the conductor, according to the characteristics of series circuit, each phase with electrical voltage, on load distribution, change the original load smaller which phase by using electrical appliances, will damage due to excessive voltage.
Q:Why the 21 lighting transformer must double winding type safety isolating transformers, prohibited the use of autotransformer.
The self winding transformer is connected by all its windings, and depends on the position of the sliding contacts to change the magnitude of the voltage. Therefore, there is not only a magnetic connection between the primary winding of the autotransformer (the power circuit) and the two winding (the power supply circuit), but also the direct connection of the circuit. It forms a circuit with the earth, so it can not be used as the power source of the safety voltage
Q:Please tell me how to calculate the transformer in the lighting circuit of elevator shaft in building electrical design
Pe=19.5KW, installed capacityKx=1 coefficient of demandPjs=KxPe=19.5KW, calculated loadCOS, phi, =0.85, power factorIjs=KxPe/3/220/cos phi (Ijs calculates current, voltage, 380V/220V, three-phase)=1*19.5*1000/3/220/0.85=34.76A
Q:What type of low voltage transformer should be adopted for safety lighting power supply?
Isolated transformer, once 380V or 220V, two voltage, 36V, 24V, 12V, several categories, do not allow the use of autotransformer.
Our well-equipped facilities and excellent quality control throughout all stages of production enable to guarantee all of our customers' requirement. CE,RoHS,SAA,C-Tick,MEPS,UL,PSE,KC and ISO 9001 certifications could be offered.

1. Manufacturer Overview

Location Guangdong,China (Mainland)
Year Established 2003
Annual Output Value US$5 Million - US$10 Million
Main Markets 10.00% North America
10.00% South America
10.00% Eastern Europe
10.00% Southeast Asia
10.00% Africa
10.00% Mid East
10.00% Eastern Asia
10.00% Western Europe
10.00% Northern Europe
10.00% Domestic Market
Company Certifications ISO 9001:2000;CE; RoHS; SAA; C-tick; MEPS

2. Manufacturer Certificates

a) Certification Name  
Range  
Reference  
Validity Period  

3. Manufacturer Capability

a)Trade Capacity  
Nearest Port YanTian
Export Percentage 61% - 70%
No.of Employees in Trade Department 3-5 People
Language Spoken: English, Chinese
b)Factory Information  
Factory Size: 1,000-3,000 square meters
No. of Production Lines 10
Contract Manufacturing OEM Service Offered Design Service Offered Buyer Label Offered
Product Price Range Low and/or Average