About this replacement
HOBOT Legee 7 / Legee D7 — 14.4V Li-ion Replacement Battery (LG700P1001)
This 14.4V 5000mAh (72Wh) Li-ion battery is a direct replacement for the HOBOT Legee 7 and Legee D7 robot vacuum. It matches the original LG700P1001 part number in voltage, capacity, and connector. When the original cell degrades after repeated cycles, suction drops and cleaning runs shorten — a fresh cell restores both.
- Legee 7 and Legee D7 platform: Both models run the same 14.4V battery architecture with the same BMS communication protocol and connector pinout. One replacement cell covers either unit without modification.
- Bench tested on actual hardware: We cycled this cell through charge and discharge on the Legee 7 platform and confirmed the BMS handshake initialised correctly. The protection circuit responded to overcurrent conditions as expected, cutting and resetting without manual intervention.
- Dock charging habit on the Legee 7: Do not leave the Legee 7 sitting on its charging dock permanently. Robot vacuums left on continuous trickle charge degrade cell capacity significantly faster than units removed from the dock once fully charged. Charge to 100%, then remove the unit from the dock until the next scheduled clean.
Suction dropping before the battery indicator reaches low
The Legee 7 motor draws peak current when working against a restricted airpath — a clogged filter forces the motor to run harder for the same suction output. That sustained high draw causes cell voltage to sag early, triggering the BMS to reduce output power before the battery indicator reflects a genuinely low state of charge. The unit appears to lose cleaning ability while the display still shows adequate charge. Clean the filter before assuming the battery is at fault — a clear airpath drops motor current draw back to rated levels and the voltage sag disappears.
Motor cuts out mid-clean then recovers on its own
This is a BMS overcurrent trip, not a mechanical failure. When suction is sustained against a partial blockage — hair wrap around the brush roll, a jammed intake, or a saturated filter — current draw spikes past the protection threshold and the BMS shuts the motor down. It resets automatically after a few seconds once current normalises. If this happens repeatedly in the same cleaning session, clear the brush roll and check the filter before resuming. A replacement battery will not stop this cycle if the root cause is airpath restriction.