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Product Parameter

Product Name: Lithium Battery Level Display Panel

Input voltage: DC3V-20V

Applicable batteries: single lithium battery or a series of multiple parallel lithium battery packs (3.7V standard lithium battery)

Product size: 44.5 * 9 * 7.2MM

Product Function

Introduction (1) Product Description:

This product is used for measuring and indicating the battery life of a single lithium battery, and of course, it can also measure and indicate the battery life of a series of multiple parallel lithium battery packs. It detects the current voltage of the lithium battery and then indicates the current voltage value of the lithium battery by controlling the high of different numbers of LEDs.

Introduction (2) Instructions for use:

This product comes with a button that, when briefly pressed and released, will turn on and display the current battery level, and then turn off after 5 seconds. Press and hold the button for more than 2 seconds in the shutdown state to turn on the device and display the current battery life, and then turn off after 5 minutes. In the power on state, it can be directly turned off by pressing the button.

When measuring the battery level, connect the positive and negative terminals of the battery to the board, and press the power button to indicate the battery level. Here is a special note: be careful not to connect the wires in reverse, otherwise it may burn out the product. The wiring diagram is as follows:

Power indicator, corresponding relationship between LED light and lithium battery voltage：

Introduction (3) Extension Explanation:

This product defaults to displaying 1 string of lithium battery level. The J1 and J2 pads on the resistance connection board can be used to set the battery level display function for 1, 2, 3, and 4 strings. The J1 or J2 connection resistance is within 0-5.1K, and users can modify it themselves. The setting method is as follows:

The working current in various states is as follows:

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