Hacked (Hardware) my Bluetooth headphones
Freemor at
Now my Bluetooth headphones will last forever. #HackAllTheThings
For those unfamiliar with the problem the tiny battery inside BT headphones like these only last about a year and then rapidly stop holding a charge. Now I can use reghargable ER9V batteries forever.
Went with the 9v because its form factor rests beautifully on the little shelf at the back of the neck.
Tomorrow I'll put it to a nice long test to see how long this 9V lasts..
White stuff around battery and board - ThermoMorphic plastic
Board - DC-DC converter to drop the 9V to the 3.5V the headphones like.
Switch - scavenged from old stuff. Needed because the board has a small parisitic drain even when the Headphones are off.
pctecserver, Charles Stanhope likes this.
Just an update on this:
so far 26+ hours of use on the Dollar store 9V battery and the battery is only down to 7.5V
Headphones need only 3.3V to run So I'm probably golden for at least another 26hr
Next run will be done with a rechargable 9V but looks like given my normal usage patterns I'll only need to recharge once every month or two.