3,7 V 1 A Einzelzelle Lithium Akku Solar Laderegler mit Lichtsteuerung
4,40 €
(Reduce the system from power consumption, improve the charging efficiency. 3) photovoltaic panels connected to "+ SOLAR", corresponding to positive and negative. 2) lithium battery connected to "+ BT 'and" -BT ", corresponding to positive and negative.
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