![]() I gess bose did this for avoiding people changing the batteries and also fighting against chinese counterfeits batteries. Yes 063xxx batteries BMS has some kind of DRM protection that won't allow to use a 061 with 063 between them. ![]() As you can see those batteries, externally, physically and even mAh are exactly the same, BUT, internals are different. For example: xxxxxxx5211xxx means 5 (2015) and 211 (july 1). Note: for finding the manufactured year and day date, check the serial number on the botom of the device, the eight number will tell you the year, nine, ten and eleven, will tell you the day of the year. ![]() and the second one (manufactured between 20) has S/N 063xxx. The first one (manufactured between 20) has S/N 061xxx. Just wanted to share the solution and fix for knowledge: Bose made 2 different battery types for the mini1. Tl dr: the soundlink mini 2 refuses to work just by putting DC on the battery connection. IIRC it has a TI gas gauge and BMS IC (which also has some DRM features), maybe I'll try to replace just that and hope they're not using the DRM features. Looking at it on the scope (picture below), it looks like the device is talking to the battery pack on i2c, but nothing back from the battery, and I guess it's refusing to work because of that (the battery pack still puts out the 7.2v it's supposed to). Bought a new (Chinese copy) battery, which still doesn't work, but I might have shorted the battery positive onto the i2c wires while soldering it in (this one has the battery soldered in, very short wires, and hard to get at the connections to the board without completely taking it apart (which seems even more of a pain to do). I have a broken soundlink mini 2, which had (has.) a flashing red battery indicator. Just because I stumbled upon this thread while trying to fix mine (or do the same thing as OP if I didn't succeed in having it working with a battery).
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