9 LED headlight Elfeland teardown.

I decided to get one of the many ridiculous LED headlights from eBay to take apart for our amusement. This one boasts 9 LEDs and six modes including the usual annoying strobe one.
The battery charging circuit is interesting for the way it combines a standard charge chip with a secondary chip that controls the battery level LEDs.
The 18650 cells they supplied were never going to be anywhere near the quoted capacity. They seem to be the typical box-ticking 18650 cell that has the lowest cost/capacity available.
Things worthy of note are the way the control PCB in the LED section was just loose in the vicinity of the metal heatsink.
I tested the current draw in each mode based on a measured voltage of 4V at the battery terminals.
Mode 1 - cluster of three LEDs. 1.7A
Mode 2 - cluster plus next pair. 2.2A
Mode 3 - cluster plus two pairs. 2.3A
Mode 4 - narrow beams 0.8A
Mode 5 - all LEDs 2.46A
The wire between the battery and LED sections was probably limiting the current.
USB charging current is around 500mA.

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Видео 9 LED headlight Elfeland teardown. канала bigclivedotcom