About this replacement
Greenhome Oley Cordless Vacuum — 31V Li-ion Replacement Battery
This 31V 2600mAh Li-ion battery pack fits the Greenhome Oley cordless stick vacuum. It powers both the motorized cleaning head and the suction system. Capacity is sourced from product data at 80.6Wh.
- Oley platform fit: The Oley series runs a 31V cell architecture that drives both the suction motor and the motorized brush head from a single pack. Voltage and connector position must match exactly — swapping in a different voltage pack will either fail to start or trip the vacuum's protection circuit immediately.
- Bench tested on actual hardware: We ran this pack through the Oley's motor-start sequence and sustained suction load. The BMS held voltage steady through the brush head engagement spike and did not trip under normal carpet resistance.
- Dock charging discipline: Do not leave the Oley sitting on the charging dock permanently. Continuous trickle charging degrades Li-ion cell capacity faster than standard charge cycles. Charge to full, then remove the vacuum from the dock.
Cordless vacuum losing suction before the battery indicator reaches low
This happens when the motor draws more current than the pack can sustain at a given state of charge. A partially blocked filter forces the motor to work harder, pulling current above the BMS's sustained threshold. The BMS then reduces power delivery to protect the cells — which reads as suction loss, not a battery fault. Clear the filter first, then check whether the symptom persists with a clean airpath.
Motor cuts out mid-clean and then recovers after a few seconds
This is a BMS overcurrent trip, not a failing cell. When suction is restricted — clogged filter, blocked nozzle, or a tight carpet pile — the motor spikes current draw beyond the pack's overcurrent limit. The BMS disconnects the output, the vacuum stops, and after the trip timer resets the pack reconnects. Fix the restriction causing the high draw. If it keeps tripping on a clean filter, check that the replacement pack voltage matches 31V exactly before assuming a cell fault.