https://stream.echo6.co/videos/watch/500a35f2-0486-4ae2-a4df-93b0b63b333c 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. If you enjoy these videos you can help support the channel with a dollar for coffee, cookies and random gadgets for disassembly at:- http://www.bigclive.com/coffee.htm This also keeps the channel independent of YouTube's advertising algorithms allowing it to be a bit more dangerous and naughty. Wed, 15 Apr 2026 11:42:20 GMT https://validator.w3.org/feed/docs/rss2.html PeerTube - https://stream.echo6.co https://stream.echo6.co/client/assets/images/icons/icon-512x512.png https://stream.echo6.co/videos/watch/500a35f2-0486-4ae2-a4df-93b0b63b333c All rights reserved, unless otherwise specified in the terms specified at https://stream.echo6.co/about and potential licenses granted by each content's rightholder.