Model 1: Mini USB input

1.Module type: 3.7V Lipo Lithium Li-ion 18650 Battery Charging Board

2.Charge mode: Linear charging

3.Charge Current: 1A

4.Charge precision: 1.5 %

5.Input voltage: 4.5V ~ 5.5V

6.Full charged voltage: 4.2 V

7.Led indicator: Red is charging, Green is full charged

8.Input interface: mini USB

9.Work temperature: -10℃~ +85℃

10.Inversed polarity: Can not reverse

11.Size: 25 * 19 * 10 MM

12.Weight: 2g

13.This module is used for single lithium charging, take power from USB charging port.

14.Ampere meter can only be connected to 5V input end of the module.

15.The better charging current is 37% of the battery capacity. If charge to the battery of 1000mAH, current of 400 is enough.

16.The connection wire should not be too thick.

17.Make sure the connect point is good.

18.If the input voltage is too high, like 5.2V, the current will be less than 1000mA, it is normal.

It is protection function, auto-substract the charging current to avoid burn damage to chip.

19.NO Reveral polarity.

Model 2: Micro USB input

Model 3: Micro USB Charger Board with protection circuit.

Model 4/5: Type-C 4.2V/4.35V 3A Charger

4.20V fit almost all normal 3.7V lithium li-ion battery.

4.35V applies to the following scenarios:

DIY some norminal 3.80V lithium batteries charge that the 4.35V charge board is too high to use 4.3V, and the disadvantage is that it may flush up to 97% or 99%. If want to charge to 100%, recommend to buy the 4.35V version.

Name: 3A Polymer Lithium Battery Fast Charging Board (Note that it is not suitable for 3.2V LifePo4 batteries)

Model: AILAVI-0503V1

Main control chip: IP2312

Input voltage: 4.5-5.5V

Charging cut-off voltage: 4.2V/4.35V (two versions of output voltage are available)

Charging current: 3A (current can be changed by adjusting resistance)

Indicator: Yes, red: work indicator.

Blue: Full Charged indicator lights.

Note: This product has no power indicator function and battery protection function.

We also have lithium battery protection board and power indicator board for sale.

Conversion efficiency: 3A 93%, 2A 94%, 1A 95% (data for reference only)

IP2312 adopts complete CC/CV charging mode.

When the battery voltage is less than 3V, it enters trickle current charging mode and charges the battery with 100mA charging current.

When the battery voltage is greater than 3V, it enters the constant current charging mode to charge the battery with the set constant current charging current.

When the battery voltage is close to 4.2V and the charging current is less than 300mA, it enters the constant voltage charging mode. After entering the constant voltage mode, stop charging every 4 minutes, and check whether the battery voltage is higher than 4.15V: If it is higher than 4.15V, stop charging; otherwise, continue charging, and then test after 4 minutes.

When the battery is full, if the battery voltage is detected to be less than 4.1V, it will be turned on to charge the battery.

Current regulation instructions:

Default 3A, remove resistor 2A and replace it with 135k resistor 1A

PCB size: 31*15mm

USB socket protrudes about 1mm