Divoom Macchiato Replacement Battery 3.7V 1400mAh

Divoom Macchiato — 3.7V Li-Polymer Replacement Battery (ACE802535)

This is a 3.7V, 1400mAh Li-Polymer replacement battery for the Divoom Macchiato portable Bluetooth speaker. Part number ACE802535 matches the original cell dimensions at 38.00 × 25.60 × 16.00mm. Fits directly into the Macchiato's battery bay without modification.

• Macchiato battery fit: The Macchiato uses a single Li-Polymer cell at 3.7V nominal. The ACE802535 matches the OEM footprint, connector orientation, and charge termination voltage so the onboard charge controller reads it correctly.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the Macchiato platform. The BMS accepted the cell without fault flags, and the fuel gauge tracked state-of-charge accurately across the full voltage window from 4.2V down to the low-voltage cutoff.
• Fuel gauge care for the Macchiato: The Macchiato's fuel gauge can drift if the speaker is always topped off before dropping below 50%. Let the battery run down past 20% at least once a month before plugging in — this recalibrates the charge estimate and keeps the indicator accurate.

Audio distorting before the battery indicator reaches empty

As the cell discharges toward 3.5V, the amplifier inside the Macchiato starts drawing more current to maintain output power. Voltage sags under that combined load, and the amplifier clips before the battery indicator triggers the low-battery warning. The audio sounds distorted or thin, but the LED still shows charge remaining. If this happens, the cell is near its lower usable limit — plug in at that point rather than waiting for the indicator to catch up.

Speaker not waking up from USB after sitting unused for weeks

Li-Polymer cells self-discharge during storage. If the Macchiato sits unused long enough, the cell can drop below the USB charge controller's minimum acceptance voltage — typically around 2.5V — and the unit won't respond when plugged in. Leave it connected to a 5V USB source for 20–30 minutes without expecting any response. Once the cell recovers past the acceptance threshold, the charge controller will engage and the indicator will come on.