Roidmi Eve Plus 14.4V Replacement Battery H18650CH-4S2P 5200mAh

Roidmi Eve Plus / SDJ01RM — 14.4V Li-ion Replacement Battery (H18650CH-4S2P)

This 14.4V 5200mAh Li-ion pack replaces the original battery in the Roidmi Eve Plus and SDJ01RM cordless stick vacuum. It fits the 4S2P cell configuration the motor controller expects. Capacity figure is taken from the product specification — 74.88Wh total stored energy.

• Eve Plus and SDJ01RM platform: Both models run the same 14.4V motor rail and use the same battery housing connector and BMS handshake. One pack covers both variants without any modification.
• Bench tested on actual hardware: We cycled this pack through sustained motor-load draws typical of the Eve Plus suction system. The BMS held cutoff voltage correctly and did not trip on normal operating current.
• Dock charging on cordless vacuums: Do not leave the Eve Plus sitting on its charging dock permanently. Continuous trickle current from the dock accelerates capacity fade in Li-ion packs. Charge to full, then remove the vacuum from the dock.

Suction dropping before the battery indicator reaches low

This happens when the motor draws more current than the battery can sustain at its present state of charge — the voltage sags under load before the cell is actually depleted. A partially blocked filter makes it worse because the motor works harder against the restriction, pulling higher current. The BMS reads the voltage drop as a low-cell condition and reduces output. Clean the filter first, then check whether the problem persists — if it does, the pack's internal resistance has risen and a replacement cell is the fix.

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

This is a BMS overcurrent trip, not a dead battery. When suction is restricted — blocked filter, stuck debris at the inlet — the motor stalls briefly and current spikes past the pack's overcurrent threshold. The BMS shuts output off to protect the cells, then resets after a few seconds once current drops. Clear the blockage at the inlet and wash or replace the filter. If the cutouts continue with a clean filter, measure resting pack voltage — anything below 14.0V at rest points to a degraded cell group rather than a blockage issue.