Chosen Solution

HI, I have a Bose Sleepbuds II case with an internal battery that needs to be recalibrated or replace, on reddit I saw it’s probably a T2 torx (they say between T1 and T3 don’t know why not more specific) but I’m having trouble finding that small of a size torx security bit. Additionally if there’s no other option that to get these screws out another way I am open to it. The product is completely dead and out of warranty and Bose wants to offer me a discount on a refurbished one, but a web search reveals these never worked well for anyone, it’s a fundamentally broken product.

Any help is greatly appreciated, thanks!

Thanks, I was able to recover my Sleepbuds with this technique. I got the screw out with a T6 torx, (with center hole) my t5 and smaller torx bits do not have the drilled out center hole. (Torx is a 6 sided star) and BOSE uses Torx Security T5 which is a 5 sided stars with center post. Searched online and can’t find a T5 Torx security driver (5 sided star) anywhere. Checked the battery voltage with multimeter… was 0 Volts, plugged in USB still 0 Volts, I supplied 5V to test point TP1 (Battery RedWire, +3.7V) a GND (Battery BlackWire) (points marked in silkscreen) Recommend using 3 Volts rather than 5 Volts… The charger came back up, 5 dot led status started to blink, 1 hour later the base is fully charged up. Bose could have designed this circuit to disconnect the internal microcontroller if the voltage dropped below 2V (pick a value) it continues to drain the battery (running the microcontroller itself) until it’s completely zapped out. I suspect that when the battery is 0V and you plug it into a USB charger. the controller wakes up, checks the battery status … sees that it’s 0 volts and suspects there’s a dead short and therefore never attempts to apply a charging voltage to the battery. I’ve got a friends Bose bluetooth speaker which is totally dead also, took it a part but without schematics it’s a hugh effort to reverse engineer. Paid $$$ and less than 2 years old, same deal Bose wanted 3/4 the money of a new one to replace it. I wonder if it has this same defect. Thanks Again

You can use a very small flathead.

I used a TORX T5H screw driver. Here is a memo I have just made on this topic.

I am late but for any others looking to take these screws out a t6 bit works fine. You do NOT need a security bit, just press down firm and screw will back out