SPECIFICATIONS

Brand Name: YTDMEN

Choice: yes

Condition: New

High-concerned chemical: none

Origin: Mainland China

Type: Module

Product Description:
3.1A Synchronous Boost Conversion
3A synchronous switching charging
Supports charging and discharging at the same time
Boosting efficiency up to 93% 4 LEDs power display
Automatic detection of cell phone insertion and unplugging
Double-click to turn off the output, single-click to turn on the output
TYPE-C support single port input and output
Intelligent recognition of cell phone charging current DCP
Intelligent load recognition, automatic standby
Output over-current, over-voltage, short-circuit protection
Input over-voltage, over-charging, over-discharging, over-current discharging protection.
Length, width and height of single C model: 26*19*4.9mm (excluding the protruding part of the USB port of the button)
C + U models length, width and height: 26 * 19 * 12mm (with USB models including USB height)

Instructions for use:

1. Before connecting the battery, connect the board to the charging head of the cell phone through the type-c cable, and see the 4 lights light up to confirm that the module chip function is intact.
2. Use a multimeter to measure the voltage of the prepared battery, make sure the battery voltage is between 3.0-4.2V, if the voltage is higher or lower than this range, the battery is likely to be bad or not applicable to the battery type.
3. Ensure that the battery is not a problem, do a good job of electrostatic protection, ready to weld the thick wire, pay attention to the positive and negative poles, reverse the board will burn.
4. Charging input can be connected to the charging head through the type-c interface, can also be accessed through the blue labeled interface in the above figure 5V, C port input current should be greater than the welding port input (C port input battery side can be 3A charging, welding port input battery side maximum 2A).

Cautions:
◆ Batteries can only be connected in parallel (parallel number is not limited), not in series, series must burn the motherboard.

◆ motherboard external battery line needs to be able to pass more than 6A current, at least 0.9 square copper wire, ordinary line to use 1.5 square. There is no need to be too thick, but not too thin, too thin will be a security risk. (Because the battery end current is very large).

◆ The motherboard comes with a protection chip, the battery does not need to add a protection board, unless your protection, the board can pass the current 6A or more, otherwise, if you have please remove the protection board, directly to our motherboard connected to the core. (Because of the general can not be brought with a high current, the output power of a large on the protection of)

◆ The use of alligator clips clip motherboard test use of small partners please do not charge the phone, do not ask why, in short, can not be used in this way. Need to charge the phone must be welded must be welded (very many buyers do not listen, - there is a problem on how to come to my motherboard is bad, how the motherboard can not be fast-charging, how the motherboard will restart and so on, the trouble is in accordance with the requirements of the operation do not be self-righteous.)

◆ Battery with 3.7V/4.2V 18650 / polymer / ternary lithium batteries, large monomer can be more than one 18650 in parallel can also be, can not use lithium iron batteries, disposable dry batteries, nickel-metal hydride, lead-acid batteries, nickel-cadmium batteries and so on. Batteries can not be connected in series access.

◆ Where the power supply will heat, this is electronic common sense, everyone's products are the same, if not heat, the current will not only be limited to 2.4A, do a 10A, 100A is not very cattle? Board cost and volume size here, the module uses a large factory mainstream chip efficiency performance is good, rest assured that the use.

◆ When the use of problems encountered, contact customer service must cooperate with customer service to provide wiring pictures using video, etc., do not accept only provide text information.

Instructions:
1. This module comes with lithium battery charging and discharging protection, if the battery with protection please remove. Battery capacity should be large enough to output 3.1A high current.
2. Connect the battery cable should be short and thick, at least 0.9 square centimeters core 3. This module output current is less than 70MA will disconnect the output, 4. If you need to use the welding line output recommended to use with the USB interface. Single TYPE-C port can not be welded line output voltage.

Q: How to judge the module is good or bad?
1 After receiving the module, do not connect the battery, directly plugged into the charging cable 5V, wait ten seconds after the four lights on, the last light flashes.
2 Use a multimeter to measure the positive and negative poles of the battery terminal, the normal voltage of 4.2V or so.
3 The above are normal that the module is intact, otherwise it has been damaged.