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Inside a Philips branded keychain torch


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At first I thought this was a generic LED torch/flashlight with Philips branding printed on it, but the packaging and design quality seems to be a bit more refined than the generic ones.

I'll guess that this is one of the signs that the Philips name is now just a licensable brand.

This branded version of the classic keychain light does have some nicer software and hardware features though. Notably that it has a dimming ramp on the main LED to give a softer on/off transition. It's also the first of this style that I've seen that has separate lithium cell protection. It's also worth mentioning that they have not crammed the biggest cell they could fit between the hot LED and the grounded USB connector, but have chosen a cell that gives space at both ends and is also thermally uncoupled from the PCB with space for the cells generously sized silicone coated wires.

The light has the following modes which I current tested with a DC clamp meter at a cell voltage of 3.8V, so the currents will be higher with a fully charged cell and lower when the cell is needing charged.

Continuous press of the button:-
The main LED ramps up to 700mA and then gradually nudges back to 125mA.

Single press of the button enters flashlight mode as follows:-
Low - Main LED runs at 60mA.
High - Main LED ramps up to 490mA and then gradually nudges back to 125mA.
Strobe - Main LED pulses at high speed with an average current of 350mA, nudging back to 200mA.

Double press of the button activates the side lights, with a single press stepping through the modes.
Near-UV at 130mA.
White at 22mA.
Red at 24mA.
Red flashing at an average of 12mA.
Blue at 64mA.
Red and blue "police light" mode 30mA average.

For any mode, if the button is not pressed for 10 seconds, the next press will turn the light off.

When plugged into a charger while in use in any mode, the light instantly reverts to low level; main beam. If not in use when plugged into the charger, the button only toggles between low and off.

This is a good compromise between full functions on flashlights that don't monitor charge status, where they can be left running at a high setting continuously with a risk of LED damage or limiting the ability of the flashlight to charge its cell completely. This approach allows a continuous useful level of light while on charge, while still allowing the internal cell to get a full charge.

The keychain attachment point at the back does not have a magnet for attaching to surfaces.

The unit appears to be glued shut, either to aid water resilience, or more likely to limit meddling.
The USB C port does have the required resistors to indicate to "smart" chargers that it needs power, and the port is covered by a simple flap that does not go into the connector.

It's a pretty nice little light.
This one came from AliExpress (not a sponsor):-
https://www.aliexpress.com/item/1005008795942698.html
It has yo-yo pricing, so if you look at the main listing and maybe add it to your basket, it may appear as a bundle deal option.
I paid just over £3 shipped as part of a bundle deal.

(For the bundle deal section, go to the main page and select bundle at the top of the page.)



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bigclivedotcom on OdyseeBy bigclivedotcom