18650 Li-ion Battery Solar Charging Module 4.2V 3.7V 3.6V Charger w/ Protection
ab 0,95 €
MINI USB female chassis and the + - pads next to the power input, access to 5V. Chip in the work of about 60 degrees heat is normal. After all, the charging current is high. charging connection wire can not be too thin and too long.
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