HexBright Flashlight Battery Teardown and Replacement

The HexBright flashlight, from 2011, is an interesting little device.  It’s a flashlight with an embedded Arduino for control, so you can reprogram it to do whatever you want.  Which, being a flashlight, mostly involves turning the light on and off and changing the brightness.


This is a companion discussion topic for the original entry at https://www.sevarg.net/2016/09/18/hexbright-flashlight-battery-teardown/

(Comments from Blogger)

2016-09-18 by hjfkmf

Why not just sand down the removable wedge to get that extra mil or two of clearance?


2016-09-18 by Russell Graves

Partly because I didn’t think of it, partly because I might want to use something else in the future.


2016-10-02 by Matt Sargent

What was the battery you get and modified in part 2, and is there a battery out there that is a drop in replacement?


2016-10-02 by Russell Graves

Panasonic 3400mAh from eBay, and I haven’t found a drop in replacement yet.


2016-10-11 by Matt Sargent

I found the following battery and it fits into my Hexbright perfectly.
https://amzn.com/B00CAD6AUE

In order to insert it you must remove the old battery and wedge, then insert the new battery and then replace the wedge. Fits perfectly and tight, as designed.


2016-10-11 by Matt Sargent

By the way, you should use the program “set_and_remember”, it is a modification of the up_and_down program. I modified the up_and_down to have it resume the last saved brightness level and the motion sensing night lite mode is perfect for camping - you can always find the light (the tailcap glows) and when you grab it, the light comes on.


2016-10-20 by dude mcginty

Easily ignorable nitpick of the week: going from 2400mAh to 3400mAh is a 42% (=1000/2400) increase, not 30% (=1000/3400). Another fun read, nonetheless.


2016-10-21 by Russell Graves

Even better then!