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26650/18650 lithium battery charger [TP5100]

 
Overview

The charger I made for my own 26650 flashlight was painted a long time ago, and later on I added fancy features such as a power bank (IP5306) and a night light.
The charging current modifies the resistance of R4, and the resistance calculation is posted on the schematic diagram. When setting the charging current to 2A, the chip and inductor will generate a lot of heat. It is recommended not to exceed 1.5A.
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26650 battery holder: [SMD 26650 battery box 1 cell SMT patch](https://item.taobao.com/item.htm?spm=a1z09.2.0.0.39ac2e8dpB9P2h&id=593001690304&_u=6rbehs10454)
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Design Files
 
 
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Update:2025-07-08 16:29:29

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