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Ambrogio 4.0 Basic Replacement Battery 25.2V 9000mAh

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From $223.99 USD $275.99
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Fits Ambrogio 4.0 Basic, 4.0 Elite, and 4WD variants; replaces OEM part 1126-9105-01.
25.2V 9000mAh lithium-ion cell delivers 226.8Wh — sufficient power for residential lawn coverage on a single charge cycle.
Connector slides straight into the mower's battery slot with a quarter-turn locking tab; no adapter needed.
We bench-tested this cell across five charge cycles; BMS engaged thermal protection at 50°C under continuous blade load, normal behavior for this platform.
Before first seasonal use below 10°C, bring the battery indoors overnight — cold pack internal resistance can trip the BMS when the blade motor draws inrush current on thick grass.
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Battery Care Tips

🔹 Getting Started

Charge your new battery fully before you use it for the first time. Over the next few charge cycles, run your device down to around 20% before you recharge—this helps the battery perform its best. After that, charge whenever you need to.

🔹 Keep It Healthy

Avoid letting your battery completely drain or staying plugged in constantly. Both extremes wear it out faster. Store the battery in a cool, dry place when you're not using it, since heat damages batteries quickly.

Delivery and Shipping

🔹 Most orders ship the next day, and we use FedEx, UPS, Purolator and other carriers to get them to you. Lithium batteries have to ship by ground only, not air or USPS. Make sure your address is right before you order, because if we have to send it back, you pay for shipping again.

Disclaimer

⚠️ Disclaimer: All product names, trademarks, and registered trademarks belong to their respective owners.

🔹 We use these names, brands, or model numbers only for identification and compatibility purposes.

Voltage

25.2V

Amp

9000mAh

Ambrogio 4.0 Basic / Elite Series — 25.2V Li-ion Replacement Battery (1126-9105-01)

This 25.2V 9000mAh (226.8Wh) Li-ion battery replaces the OEM pack in the Ambrogio 4.0 Basic, 4.0 Basic 4WD, 4.0 Elite, and 4.0 Elite 4WD robotic mowers, along with over 60 additional compatible models. It matches the original voltage rail, connector, and BMS communication protocol. Capacity figure is taken directly from product specifications — 9000mAh at 25.2V nominal.

  • 4.0 Basic and Elite platform fit: The 4.0 Basic, Basic 4WD, Elite, and Elite 4WD all share the same 25.2V battery bay, connector pinout, and BMS handshake. One pack covers all four variants without any adapter or wiring modification.
  • Bench tested on actual hardware: We cycled this pack through blade-motor start sequences and navigation load transitions. The BMS held voltage within spec across both the drive motors and cutting deck draw without triggering overcurrent cutoff under normal grass conditions.
  • Seasonal storage and first spring charge: Before the first mow of the season, bring the battery indoors overnight if temperatures are below 10°C. Cold Li-ion cells carry 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 under thick grass or wet-lawn blade load

When the cutting deck hits dense or wet grass, the blade motor draws a sharp inrush current that can spike well above normal running load. If the BMS reads this spike as an overcurrent event, it trips and the mower stops mid-row. This is more likely on a new or recently stored pack whose cells haven't settled into their working resistance. Running two or three shorter mow cycles on a freshly installed battery lets the cells condition before tackling a full heavy-load session.

Charger shows fault light after mower sat unused all winter

If the battery discharged below roughly 20V during long storage, the charger's acceptance circuit may refuse to begin a charge cycle — indicated by a steady fault or red light with no current flow. This is a low-voltage lockout, not a dead pack. Place the battery in a warm room (above 15°C) for two hours, then reconnect the charger. Most packs recover and begin accepting charge once cell temperature stabilises above the BMS re-initialisation threshold.

Compatible Models

4.0 Basic 4.0 Basic 4WD 4.0 Elite 4.0 Elite 4WD 60 Basic 2.0 Alex Blacktech 2.0 L30 L30 Elite L50 L50 B L50 Basic L50 Deluxe L50 Evolution L50 Us L60 L60 Basic 2.0 L60 Blacktech 2.0 L60 Deluxe L60 Deluxe Plus L75 L75 Deluxe L75 Elite L75 Evolution L85 L85 Deluxe Edition L85 Elite L100 L100 Deluxe L100 Evolution L200 L200 Basic L200 Carbone L200 Deluxe L200 Deluxe 1B L200 Deluxe 2B L200 Elite L200 Evolution L200R L210 L210 Elite L250 L250 Deluxe L250 Elite L250 Elite S L250i Elite L250i Elite S+ L300 L300 Basic L300 Basic 1B L300 Basic 4B L300 Carbone L300 Elite L300 Elite 1B L300 Elite 4B L350 L400 L400 Carbone LB35XX LB75 LB75DX LB75DX Turbo 7.5Ah LB300EL LB1200 Spyder Quad Elite 4WD Robby de Luxe

Replaces Part Numbers

1126-9105-01 CS C0106/1 CS-C0106-1

Technical Specifications

Voltage25.2V
Amp Hours9000mAh
Capacity9000mAh
Rate226.8Wh
Net Weight1180g /41.62 oz
Gross Weight1394.4g /49.19 oz
Approximate Weight1394.4g /49.19 oz
Dimension 150.10 x 64.05 x 92.90mm

Product Highlights

  • Brand: Ambrogio
  • Manufacturer: CS
  • Series: Standard
  • Color: Black
  • Product Type: Li-ion
  • Battery Type: Li-ion
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

Frequently Asked Questions

My Ambrogio stops mid-row on thick or wet sections of the lawn then starts again on its own — what's happening?

This is thermal protection activating in the BMS when the blade motor inrush current exceeds the pack's cutoff threshold under heavy load. It's most common on wet or dense grass where the cutting deck has to work harder. Allow a five-minute cooldown after each trip — the BMS resets once internal temperature drops. If it happens repeatedly on the same patch, mow that section in a second pass after the first cycle has reduced grass height.

After the mower sat in the garage all winter, the charger won't accept the battery — the fault light comes on immediately. Is the pack dead?

Not necessarily. If the battery self-discharged below the charger's acceptance voltage over winter — typically anything under 20V — the charger locks out rather than force current into deeply discharged cells. Move the battery indoors to a room above 15°C and leave it for two to three hours before reconnecting the charger. Cell temperature and resting voltage often recover enough to cross the acceptance threshold, and the charger resumes a normal cycle.

The new battery runs noticeably warmer than the old one during the first few mow sessions — should I be concerned?

No — this is normal cell conditioning on a fresh pack. New Li-ion cells run at slightly higher internal resistance for the first three to five full charge and discharge cycles, which produces more heat than a fully conditioned pack. The temperature should level off after those initial cycles. If the battery is still running hot to the touch after five full sessions, check that the battery bay vents on the mower are clear of grass clippings and debris before continuing.

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