Dreame RLS5-BL1 14.4V Replacement Battery 6800mAh

Dreame RLS5-BL1 / Bot L10 Series — 14.4V Li-ion Replacement Battery (P2008-4S2P-MMBK)

This is a 14.4V, 6800mAh Li-ion battery for the Dreame RLS5-BL1 cordless vacuum and the Bot D9 Max, Bot L10 Pro, and Bot L10 Ultra robot vacuum platforms. It replaces OEM part numbers P2008-4S2P-MMBK, P2026-4S1P-MMBK, P2150-4S2P-MMBK, P2150-4S2P-XWDLS, and R2228-4S2P-MMBK. Capacity is 6800mAh (97.92Wh) — matching the original specification exactly.

• RLS5-BL1 and Bot L10 series compatibility: These models share the same 14.4V cell architecture, connector pinout, and BMS communication protocol. A single battery pack spans the full range because the charger and motor controller expect the same voltage rail and handshake across all variants.
• Bench tested on actual hardware: We ran this pack through full charge and discharge cycles on the RLS5-BL1 platform. The BMS responded correctly to motor-start current spikes, held the cell voltage within spec under sustained suction load, and did not trigger false overcurrent cutoffs during normal carpet cleaning cycles.
• Dock charging practice for this vacuum: Do not leave the vacuum sitting on the charging dock continuously between uses. Dreame cordless vacuums on permanent dock charge trickle-charge the cells even when full, accelerating capacity fade. Charge to full, then remove from the dock until the next use.

Suction dropping before the battery indicator reaches low

This happens when cell voltage sags under load before the BMS triggers the low-battery warning. An aged or partially degraded battery pack loses internal resistance headroom — voltage dips sharply when the motor demands peak current, reducing suction force without the indicator catching it. A restricted or dirty filter compounds this: the motor works harder, draws more current, and the voltage sag deepens. Replacing the battery restores the full voltage headroom, and cleaning the filter ensures the motor draws current within the rated range.

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

This is a BMS overcurrent trip, not a motor fault. When the filter is partially blocked or the brush roll is jammed, the motor pulls more current than the BMS threshold allows — the pack disconnects, the motor stops, and the BMS resets after a short thermal delay. The cycle then repeats. Check and clean the filter and brush roll first. If the cutout continues on a clear airway, the original battery's BMS trip threshold has degraded — the replacement pack restores the correct cutoff margin at the rated 14.4V operating voltage.