Dreame MC1808 Replacement Battery 14.4V 2500mAh Li-ion

Dreame MC1808 — 14.4V Li-ion Replacement Battery (P1904-4S1P-MM)

This 14.4V 2500mAh Li-ion battery replaces the original pack in the Dreame MC1808 cordless vacuum cleaner. It matches the OEM part number P1904-4S1P-MM and fits directly into the MC1808 battery bay. Voltage and capacity are matched to the original specification.

• MC1808 platform fit: The MC1808 runs a 4S Li-ion cell configuration on a 14.4V nominal rail. The BMS in this pack communicates the same charge and discharge parameters as the original, so the vacuum's power management behaves normally through the full discharge cycle.
• Bench tested on actual hardware: We ran this pack through charge and discharge cycles on the MC1808 platform. The BMS held cutoff voltage at the correct threshold and the charger handshake completed without faults on every cycle tested.
• Dock charging on the MC1808: Do not leave the MC1808 sitting on the charging dock continuously between uses. Cordless vacuums on permanent dock charge develop capacity fade faster than units charged only when the battery is depleted. Charge to full, then remove the vacuum from the dock.

Suction dropping before the battery indicator reaches low on the MC1808

This happens when the motor draws more current than the BMS expects — usually because a partially blocked filter forces the motor to work harder. The added load pulls the cell voltage down faster than the indicator circuit anticipates, so the vacuum feels like it is losing charge when the filter is actually the cause. Clean or replace the filter first. If suction recovers and the battery indicator stabilises, the pack is fine. A battery genuinely reaching end of life will show voltage sag even on a clean filter — cell voltage at full charge should read 16.8V across the pack terminals.

MC1808 motor cutting out mid-use then recovering after a few seconds

This is a BMS overcurrent trip, not a faulty battery. When suction is restricted — blocked nozzle, saturated filter, or a hair wrap around the brush roll — current spikes past the BMS protection threshold and the pack shuts the motor off. The BMS resets automatically once current drops, which is why the vacuum recovers after a short pause. Clear the blockage and check the filter before assuming the battery is at fault. If cutouts continue on a clear airpath, the cell voltage under load is dropping below the BMS floor — check resting voltage, which should be above 14.0V on a fully charged pack.