About this replacement
Bose SoundLink Mini 2 — 7.4V Li-ion Replacement Battery (088789)
This 7.4V 2200mAh (16.28Wh) Li-ion battery fits the Bose SoundLink Mini 2 portable Bluetooth speaker. It replaces OEM part numbers 088789, 088796, 088772, and 080841. If your speaker no longer holds a charge or cuts out during playback, this cell restores the original power rail.
- SoundLink Mini 2 compatibility: All four OEM part numbers listed above share the same 7.4V two-cell Li-ion configuration, connector pinout, and BMS communication protocol used in the Mini 2 chassis. The pack fits the same physical bay and negotiates charge termination with the onboard charger circuit the same way the original does.
- Bench tested on actual hardware: We ran this pack through charge and discharge cycles on a SoundLink Mini 2 unit, confirmed the BMS reported accurate state-of-charge to the LED indicator, and verified the protection circuit triggered correctly at low-voltage cutoff without false trips during amplifier current spikes at high volume.
- Fuel gauge recalibration after install: After fitting this battery, run the speaker down until it shuts off automatically, then charge uninterrupted to 100% before use. The SoundLink Mini 2's fuel gauge ICs calibrate on a full discharge-to-charge cycle — skipping this step causes the charge indicator to misread remaining capacity from day one.
Audio distortion before the battery indicator reaches empty
The SoundLink Mini 2 amplifier draws peak current during bass-heavy or high-volume audio. When the cell voltage sags under that load, the amplifier clips before the protection circuit triggers a full shutdown. The result is audible distortion — crackling or thinning of low frequencies — while the LED still shows one or two bars. A battery with degraded internal resistance sags harder under amp peaks than a fresh cell does. Replacing the pack and completing a full recalibration cycle resolves this in most cases.
Speaker won't wake from USB after sitting unused for weeks
If the SoundLink Mini 2 sits uncharged for several weeks, the cell can drop below the USB acceptance threshold — typically under 2.5V per cell, or around 5V pack voltage. At that point, the charging IC ignores the USB input and the speaker appears completely dead. Connect the original Bose 10W charger rather than a USB-C power bank — the barrel-connector charger applies a low-current pre-charge trickle that USB PD negotiation does not. Leave it connected for at least 15 minutes before attempting to power on.