Stiga Autoclip 125 Replacement Battery 25.9V 7800mAh

Stiga Autoclip 125 / 140 Series — 25.9V Li-ion Replacement Battery (110Z03700A)

This is a 25.9V 7800mAh Li-ion replacement battery for the Stiga Autoclip robotic mower range, including the Autoclip 125, 127, 140, and 140 4WD. It matches the OEM part number 110Z03700A (Typ B) and fits directly into the battery bay on compatible Autoclip models. Voltage and BMS communication protocols match the original Stiga specification.

• Autoclip platform compatibility: The Autoclip 125 through 140 4WD series shares the same 25.9V battery rail, connector pinout, and BMS handshake protocol. One replacement cell pack covers the full model range listed above without modification.
• Bench tested on actual hardware: We ran this pack through charge and discharge cycles on a Stiga Autoclip unit. The BMS responded correctly to charge termination, cell balancing, and blade-motor inrush current without tripping protection on a clean lawn surface.
• Seasonal storage tip: Before the first mow of the season, bring the battery indoors overnight if temperatures are below 10°C. Cold Li-ion cells have higher internal resistance, and the blade motor's inrush current can trip the BMS on a cold pack before the cells warm up.

BMS cutoff on thick grass and wet-lawn blade load

The Autoclip's blade motor draws significantly more current through dense or wet grass than on a dry, short lawn. If the pack's BMS detects a current spike above its protection threshold — typically caused by the motor stalling briefly against a heavy load — it cuts output to protect the cells. This is a protection event, not a fault with the battery. Reduce the mowing zone size or raise the cutting height to lower blade load, and the BMS will stop tripping.

Charger rejecting the pack after winter storage

Li-ion cells left in storage over winter will self-discharge slowly. If the pack voltage drops below approximately 20V, most Stiga chargers will refuse to initiate a charge cycle — the charger shows a fault LED and does nothing. To recover the pack, use a compatible charger with a recovery or trickle mode to bring cell voltage back above the acceptance threshold. Once the pack reaches around 22V, the charger will recognise it and begin a normal charge cycle.