From bigclivedotcom.

These lights have a really nice case and appearance. I actually had high hopes of them being a great light. They even seemed to have a dedicated all-in-one charge control and PIR monitoring chip.

Then I dug a little deeper…..

A simple diode test between the solar panel input pins and the power pins of the chip showed a single diode drop. So the unit does appear to be using the built in protection diodes of a standard microcontroller. I tested to see if the unit did anything to regulate the charge on the lithium cells by turning on the LED filament to shunt the voltage down a bit, but it didn’t.

At this point it appears to be luck whether the lithium cell gets overcharged or not.

Thankfully they’re fairly low capacity. The large cell measured 500mAh, the smaller one measured 300mAh.

Two improvements to these lights would be adding a small protection module to the lithium cell, and adding a resistor to limit the maximum current through the LED filament. That will also give longer operational time on a charge.

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