DC DC boost 3.7V to 5V 2A USB converter for 18650 battery DIY mobile power bank double 2 USB output micro USB input

Welcome to Inquiry
Best Electronics Service for you!!!

We produce MODULE ! CUSTOM-MADE module is OK! Our company produce your own board!

  Online Shopping LED Battery indicator Mobile Charger Power bank circuit board 3.7V up to 5V 2A boost module diy software board   

-----------------------------------------------------------------------------------------------------------------
PRODUCT PICTURE

------------------------------------------------------------------------------------------------------------------
PRODUCT FEATURES

Mobile power software version and hardware version of the difference and the pros

and cons

Bottom line: software version than hardware version!

1. The hardware version is continuing to run the software version is auto-sensing.

There are loads only run. Longer life than hardware board

2. Hardware version led battery indicator is not precise enough, can not breathe

lights, marquees effect. Software version is intelligent. Hardware Version relatively

very accurate battery indicator

3. The hardware board conversion efficiency is generally 75%. The conversion

efficiency was 85% board software. That same capacity mobile power to charge your

cell phone, the hardware may only be charged twice. Software may get filled 3 times.

This is more obvious the greater the difference in capacity.

4. The software version of a longer service life, the use of software version control IC,

can be programmed to control the LED display, more intelligent; hardware version

just use a simple circuit to control the charge and discharge.

Because it is easy to achieve synchronous rectification, high efficiency, low heat, and

a flexible function, it has become a trend. Plate optimization software mainly to

accelerate the speed of the main loop, at present, the core technology to provide

solutions for the sea known as the main loop of less than 200us. Hardware, through

the integration of dedicated comparators to achieve rapid control, for example,

carried out at 5.0v dc-dc comparison, 5.5v unconditional Close pwm control. In

addition to this problem, there are software board stability master controller itself,

for example, crash, reset, esd, eft etc.

Input interface: V8 port, micro USB (Andrews mouth, flat mouth)

Section 6 covers attached battery Dimensions: width 70MM * 20MM * thick length

110MM

Power display: 4 LED lights display battery level, non-working state intelligent

automatic shutdown

Charging display: when charging 0-25%, a light flashing, other does not light, the

charge to 25% - 50%, the second light flash,

The first light becomes steadily lit charge to 50% - 75% in the third lights flashing in

front of two light into constant light,

Charged to 75% --- 100% fourth lights flashing in front of three light into constant

light, four lights lit charge to 100%

Buy before reading:

1: You can use batteries: lithium polymer battery 18650 battery cell phone battery flat

battery MP3 battery

     Access Battery Requirements: 3.7-4.2V polymer battery: can not access other

batteries, such as nickel-metal hydride battery 1.2V, 3.2V lithium iron batteries, all

batteries, 6V 12V lead-acid batteries

2: The charge-discharge protection: Built-in lithium battery protection circuit board

IC, overvoltage protection, overcurrent protection, undervoltage protection

3: Charging Input requirements: the best match is over 5V1A charger, any other 5V

voltage power supply can be used as the charge input power

=====  At present the board with a green spot version =====

-----------------------------------------------------------------------------------------------------------------

SHIPPING TERMS

1.Ship to whole world : DHL , UPS, FEDEX, EMS, HKPOST, SGPOST,SWPOST

2.Lead time:2days. If we don't have stock at that time, it takes 2-4days to produce it.

 ------------------------------------------------------------------------------------------------------------------
PAYMENT TERMS

1.We accept PAYPAL, TT, WESTERN UNION, ESCROW

2.Commission:
   *Paypal: total sum *0.041
   *Escrow: total sum *0.05
   *TT: $28-$45(according to amount)
   *Western union: $0

---------------------------------------------------------------------------------------------------------------------
GUARANTEE PERIOD

    3 Months, if the quality have any problems, We have a good after sale

service team will slove the quality problems for you.

1.If you test the products and it doesn't work, pls keep it and send it to us in 

   1 month, we will send the good one to you with the following order.

2.If the product is already used by you, then no warranty.

3.If the product is broken by man-made, then no warranty.

----------------------------------------------------------------------------------------------------------------------
CONTACT US