Involvement:Expert (understands the inner workings) - Ownership:1 day to 1 week
It's a very small and cheap charger, perfect for travels and for all those old Li-Ion cells in the back of the drawer missing the original charger. Charges from USB power, standard PC port is enough (500mA). Automatic polarity detection.
Only charges cells to around 4.15V. Charger pins seems a bit fragile. Some cells are hard to get connected correctly, specially if the terminals is placed on the edge of the cell. Works best with a USB extension cable.
It charges with up to 500mA at Vbat=3V, and gradually drops down to 100mA at Vbat=4.15V before stopping.
A nice handy charger, but be careful when connecting it to the cells.
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