About this replacement
Breo iDream 3 iNeck — 3.7V Li-Polymer Replacement Battery (MB2300)
This 3.7V 2200mAh Li-Polymer battery replaces the MB2300 cell in the Breo iDream 3 iNeck wearable neck massager. It restores power to the device's electrical stimulation and massage functions when the original cell no longer holds a charge. Dimensions are 49.70 × 29.70 × 16.00mm — confirm these against your existing cell before fitting.
- iDream 3 iNeck fit: The MB2300 part number is specific to this wearable massager. The 3.7V nominal voltage matches the device's motor and stimulation circuit rail. The Li-Polymer form factor fits the compact housing without modification.
- Bench tested on actual hardware: We cycled this cell through the iDream 3 iNeck's combined motor and EMS load. The BMS held stable across stimulation mode transitions and did not trip on motor start draw. Capacity read within spec at full charge.
- Port moisture protocol: After use against skin, let the charging port air out for at least 10 minutes before connecting the cable. Moisture bridging the contacts can trigger a BMS protection fault — the device will show no charge activity and appear dead, even with a healthy battery.
Massage intensity dropping before the battery indicator shows low
The iDream 3 iNeck runs both a motor and an EMS circuit simultaneously at peak intensity. This combined load pulls more current than the fuel gauge samples at idle, so voltage can sag below the motor's minimum operating threshold while the indicator still shows partial charge. An aged or degraded cell has higher internal resistance, which amplifies this sag under load. Replacing the cell restores the low internal resistance needed to sustain both circuits at full draw without voltage dropping out.
Device reads fully charged but loses power within a few uses
Daily top-up charging — plugging in after every short session without running the battery down — causes the fuel gauge to drift from the cell's actual state of charge over time. The device reports 100% based on a stale reference point, not real capacity. The cell itself degrades faster under constant shallow cycles, accelerating capacity loss. If you see this pattern, the cell needs replacement; fitting a new MB2300 resets the cycle count and restores accurate charge readings from 3.7V nominal to the 4.2V full-charge ceiling.