Lithium-ion battery charger
Source: InternetPublisher:dEW3sYxKG Keywords: Battery charger Updated: 2026/01/27
Lithium-ion battery charger
This is an easy-to-build charger for a single 3.7V lithium polymer battery. At its core is a TL431 shunt regulator, which controls the input current. The charger features a convenient charging LED indicator. The LED brightness decreases as the charging current decreases.
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