An ultra-small, 1A charging board for 3.7V lithium batteries with USB Type-C power input and LED charge indicators Charges to 4.2V, provides 100mA pre-charging for batteries with voltages under 2.9V Incorporates automatic charge cycle termination and resumption for efficient charging Integrates safety features including over-current, over-voltage, and under-voltage protection for secure charging Compact and lightweight design (14×18×5mm), easy to install and use.
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