Stiga Autoclip 700 Replacement Battery 25.9V 15000mAh

Stiga Autoclip 700 / 720 S — 25.9V Li-ion Replacement Battery

This is a 25.9V, 15000mAh (388.5Wh) Li-ion battery pack for the Stiga Autoclip 700 and Autoclip 720 S robotic lawn mowers. It slots into the same battery bay and connects to the same charging contacts as the original pack. Capacity figure is taken directly from the product specification — not estimated from comparable cells.

• Autoclip 700 and 720 S shared platform: Both models run the same 25.9V battery rail, use the same bay geometry, and communicate with the same BMS handshake on the docking station. One battery spec covers both.
• Bench tested on actual hardware: We cycled this pack through charge, dock, and mow sequences on the Autoclip platform. The BMS reported correct cell voltages throughout, and the docking station accepted the charge cycle without fault codes.
• Seasonal start-up tip: Before the first mow of spring, bring the battery indoors overnight if temperatures are below 10°C. Cold Li-ion cells have higher internal resistance, and the blade motor inrush current on a cold pack can trip the BMS before the mower completes its first row.

BMS cutoff on thick-grass and wet-grass blade load

The Autoclip's blade motor draws a sharp inrush current when it hits dense or wet grass. If the battery's state of charge is below roughly 20%, cell voltage sags fast enough that the BMS registers an undervoltage condition and cuts the output. The mower stops mid-row, then recovers once the BMS resets. Keeping the pack above 30% before a heavy-grass run avoids most of these trips.

Charger showing a fault after the mower sat unused all winter

Li-ion cells self-discharge slowly during storage. After several months in a cold garage, the pack voltage can drop below the charger's acceptance threshold — typically around 20V on a 25.9V pack — and the docking station raises a fault rather than starting the charge cycle. To recover the pack, use a compatible bench charger set to recovery or wake mode to bring each cell group above 3.0V, then return the pack to the dock. Once the dock sees an acceptable voltage, the normal charge cycle resumes.