About this replacement
Dyson G5 Detect Series — 36V Li-ion Replacement Battery (507147-07)
This is a 36V, 2500mAh Li-ion replacement battery for the Dyson G5 Detect Absolute, G5 Detect Fluffy, Gen5 Outsize, and related G5 Detect models. It matches OEM part numbers 507147-07, 512048-07, 972382-01, 972382-03, and 972382-04, covering SV23 and SV24 platform vacuums. Swap it in when the original cell no longer holds a useful charge.
- G5 Detect platform compatibility: The SV23 and SV24 motor boards share the same 36V power rail and use an identical BMS handshake protocol. That is why one battery pack covers the Absolute, Fluffy, and Outsize variants — the connector pinout and communication lines are the same across all G5 Detect configurations.
- Bench tested on actual hardware: We ran this cell through full charge and discharge cycles on the SV23 platform. The BMS negotiated correctly with the vacuum's motor controller, voltage held steady under the high-torque DLS motor load, and the protection circuit triggered cleanly at the low-cell cutoff threshold without nuisance trips.
- Dock charging habit on G5 Detect vacuums: Do not leave the vacuum on the charging dock permanently. G5 Detect units on continuous dock power develop capacity fade faster than units charged only when the battery is depleted. 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 battery can supply at its actual state of charge, causing a voltage sag that the indicator does not reflect accurately. A partially blocked filter is the most common trigger — restricted airflow forces the DLS motor to work harder, pulling current spikes the BMS was not expecting. The battery is not necessarily failing; the motor load is the real cause. Clean or replace the filter first, then retest — if suction stabilises, the battery cell is fine.
Motor cuts out mid-use then recovers after a few seconds
This is a BMS overcurrent trip, not a dead battery. When sustained restricted suction forces the motor to draw above the protection threshold — typically triggered by a blocked filter or a tangled brush bar — the BMS shuts the output rail and resets after a short thermal pause. The vacuum restarts because the BMS clears the fault once current demand drops. Clear the blockage, check that the brush bar spins freely, and confirm the filter is clean before putting the vacuum back into use.