Stiga Autoclip 125 Replacement Battery 25.9V 10200mAh

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

This 25.9V, 10200mAh lithium-ion battery replaces OEM part 110Z03700A in the Stiga Autoclip robotic mower range. It fits the Autoclip 125, 127, 140, and 140 4WD among others — all share the same voltage rail and connector format. Capacity is taken from verified product data at 264.18Wh.

• Autoclip 125–140 series compatibility: These models run the same 25.9V battery platform with a shared BMS handshake protocol and identical connector pinout. Swapping between models in the range requires no adapters or wiring changes.
• Bench tested on actual hardware: We ran this pack through a full charge-discharge cycle on the Autoclip platform. The BMS accepted charge normally, communicated state-of-charge to the dock correctly, and blade motor inrush at startup did not trip the protection circuit.
• Seasonal storage tip: If the mower sat on the dock all winter with a flat or near-flat pack, bring the battery indoors at room temperature for 24 hours before attempting a charge. A deeply discharged cell can read below the charger's acceptance threshold and the dock will show a fault rather than begin charging.

BMS cutoff during thick-grass or wet-grass blade load

The Autoclip blade motor draws significantly more current when cutting dense or wet grass than during normal dry-lawn operation. If the current spike exceeds the BMS protection threshold, the pack shuts output to prevent cell damage. This is not a battery fault — it is the protection circuit doing its job. Return the mower to lighter terrain, allow a 5-minute cooldown, then resume. If cutoffs repeat on normal grass, check that pack voltage under no-load reads above 24V before the next mowing session.

Dock showing fault light after mower sat unused all winter

Li-ion cells self-discharge slowly over months of storage. If the pack voltage drops below roughly 20V, many Stiga docks will refuse to initiate a charge cycle and show a fault or error indicator instead. The fix is to bring the battery indoors to 18–20°C for at least 12 hours, then retry the dock. In most cases the dock will accept the pack and begin a recovery charge once the cell temperature and resting voltage stabilise. If the dock still rejects the pack after warming, check resting voltage with a multimeter — a reading below 18V indicates cell damage from deep discharge.