Wiper Blitz 25.2V Replacement Battery 9000mAh Li-ion

Wiper Blitz Series — 25.2V Li-ion Replacement Battery

This 25.2V 9000mAh Li-ion battery replaces the original pack on the Wiper Blitz, Blitz 2.0, Blitz 2.0 Evolution L60, and Blitz X cordless lawn mowers. It delivers 226.8Wh of capacity to the blade motor circuit. Drop voltage or capacity and blade torque suffers immediately — this pack matches the original spec exactly.

• Blitz series compatibility: The Blitz, Blitz 2.0, and Blitz 2.0 Evolution L60 share the same 25.2V battery rail and connector format. The BMS handshake across these models recognises the same cell configuration, so the pack communicates correctly with each charger variant in the range.
• Bench tested on actual hardware: We ran this pack through full charge and discharge cycles on a Blitz mower, monitoring BMS behaviour under simulated blade-load spikes. The protection circuit held voltage within the expected window and did not trip under normal cutting inrush current.
• Seasonal storage tip: Before the first cut 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 pack that hasn't warmed up.

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

When the blade motor hits dense or wet grass, inrush current spikes sharply — often two to three times the steady-state draw. If the pack's cells are partially discharged or have begun to age, internal resistance rises and the voltage sag under that spike can cross the BMS undervoltage threshold. The mower shuts off as a protection response, not a battery failure. Let the pack rest for five minutes before restarting — this allows the BMS to reset and the cells to recover surface charge.

Charger showing a fault light after the mower sat unused all winter

Li-ion packs self-discharge slowly over months of storage. If the cell voltage drops below approximately 2.5V per cell, most chargers read the pack as faulty and refuse to charge it. This is a charger safety response — the cells are not necessarily dead. Some Wiper chargers include a recovery or wake-up mode; consult the charger label for a dedicated recovery button or alternate port. If no recovery mode exists, a compatible bench charger set to a gentle precharge at 0.1C can bring cell voltage back above the 2.5V acceptance threshold before handing off to the standard charger.