GreenWorks 40V 5000mAh Compatible Battery 24252 G-MAX

GreenWorks 40V Li-ion 5.0Ah Replacement Battery (24252 / 29302 / 29462)

This is a 40V, 5000mAh lithium-ion battery for GreenWorks G-MAX 40V cordless outdoor power tools. It fits the 20292 lawn mower and compatible models in the 40V G-MAX platform, including chainsaws, hedge trimmers, and string trimmers. Replaces OEM part numbers 24252, 29302, 29462, 29472, and 2601102.

• G-MAX 40V platform fit: Models 20292, 20302, 20672, and 21332 share the same 40V battery rail, connector housing, and BMS handshake protocol. One pack works across all of them without adapters or firmware changes.
• Bench tested on actual hardware: We ran this pack on a 20292 mower and a G-MAX chainsaw. The BMS handled motor-start inrush current without nuisance tripping and held the 40V rail stable through sustained load cycles.
• First-use motor load conditioning: On the first two uses, run the tool at half throttle or partial load before going full bore. This lets the BMS register the motor's inrush current signature and calibrate overcurrent thresholds before you hit maximum torque applications.

BMS cutoff on G-MAX motor-start inrush surge

When a GreenWorks 40V mower or chainsaw pulls trigger from a dead stop, the motor draws a short current spike — sometimes 3–5× the running current. If the BMS overcurrent threshold is set tight or the pack is cold, it reads that spike as a fault and cuts output immediately. This is not a defective battery. Warming the pack to above 10°C before use and easing into full load on the first pull usually prevents the trip. A pack that trips repeatedly under normal conditions at room temperature should be inspected for high internal resistance — check cell voltage at rest; a healthy cell sits above 3.6V per cell.

Charger shows blinking red and won't accept the pack after storage

GreenWorks 40V chargers have a minimum cell voltage threshold — typically around 2.5V per cell — below which the charger refuses to begin a charge cycle and blinks red. A pack stored discharged for several months can drop below this threshold through self-discharge. To recover it, some GreenWorks chargers support a trickle or "wake-up" mode: remove and re-seat the pack firmly three times, then leave it seated for 10–15 minutes. If the charger still won't initiate, measure pack voltage directly — if it reads below 28V across the terminals, the cells may have dropped too far for recovery and the pack should be replaced.