Xiaomi Roidmi Eve Plus 14.4V Replacement Battery 5200mAh

Xiaomi Roidmi Eve Plus / Viomi Series — 14.4V Li-ion Replacement Battery (SUN-INTE-181)

This 14.4V, 5200mAh Li-ion battery replaces the SUN-INTE-181 pack in the Roidmi Eve Plus cordless vacuum and compatible Viomi models including the A1, ALPHA UV, and D800. It fits the stick vacuum's battery bay directly and connects to the same BMS communication circuit the motor controller expects. Capacity figures come from product data — 74.88Wh total energy.

• Roidmi Eve Plus and Viomi platform fit: These models share a common 14.4V cell architecture, connector pinout, and BMS handshake protocol. One battery pack covers the full group because the motor controller reads the same charge-state signal across all four variants.
• Bench tested on actual hardware: We cycled this pack through sustained motor load on the Eve Plus and confirmed the BMS held the 14.4V rail steady through multiple cleaning modes. Overcurrent protection tripped correctly when the airway was blocked, then reset cleanly on clearing.
• Dock charging behaviour on the Eve Plus: Leave the vacuum seated on the charging dock only until the pack reaches full charge, then remove it. Cordless vacuums parked on the dock indefinitely receive a low-level trickle that accelerates capacity fade — the Eve Plus charger does not switch to a true maintenance mode once full.

Suction dropping before the battery indicator reaches low

This is not always a battery fault. When the Eve Plus filter is partially clogged, airflow restriction forces the motor to draw more current than rated. The BMS reads the voltage sag caused by that overcurrent and interprets it as a depleted pack — triggering a power reduction before the indicator shows low. Clean the filter first. If suction still drops with a clean filter and a charged pack, the cell voltage under load has likely degraded below the 13.5V threshold the motor controller needs to maintain full power.

Motor cuts out mid-clean and then recovers after a few seconds

This is a BMS overcurrent trip, not a wiring fault. It happens when sustained suction against a blockage — carpet fringe, debris catch, or a clogged cyclone — pulls current beyond the pack's continuous discharge limit. The BMS cuts the output to protect the cells, waits a few seconds, then resets. Clear any obstruction and check that the cyclone separator is fully seated. If trips repeat on an unobstructed machine, verify the pack is resting at or above 14.4V on a full charge before use.