Gardena 18V Lawnmower Compatible Battery 5000mAh Li-ion
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Gardena 18V Lawnmower Compatible Battery 5000mAh Li-ion - is backordered and will ship as soon as it is back in stock.
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Battery Care Tips
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
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.
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Disclaimer
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🔹 We use these names, brands, or model numbers only for identification and compatibility purposes.
Gardena 18V Lawnmower Compatible Battery 5000mAh Li-ion - is backordered and will ship as soon as it is back in stock.
Voltage
18V
Amp
5000mAh
Gardena Lawnmower — 18V Li-ion Replacement Battery
An 18V 5000mAh (90Wh) lithium-ion battery built for the Gardena PowerMax 32/36V lawnmower and other tools in the POWER FOR ALL ALLIANCE ecosystem. The PowerMax runs a 32cm cutting deck and draws from the shared 18V platform common across multiple brands and garden tools. One battery, many compatible devices.
- Cross-brand P4A compatibility: These models share the same 18V rail, connector standard, and BMS communication protocol used across the POWER FOR ALL ALLIANCE — that is why one pack covers Gardena, Bosch, and other P4A tools on the same platform.
- Bench tested on actual hardware: We ran full charge/discharge cycles on P4A-compatible tools — the BMS held voltage steady under load and tripped the low-voltage cutoff cleanly without a hard shutdown event.
- First charge before mowing: With Li-ion, condition the pack with a full charge before the first use — this lets the BMS calibrate the state-of-charge window accurately from the start.
How the 90Wh capacity maps to a 32cm cutting deck
The PowerMax 32/36V draws harder on dense or wet grass because the motor adjusts torque to maintain blade speed across the 32cm width. A 90Wh pack gives the motor headroom to handle those peaks without immediately stressing the low-voltage cutoff. Gardena rates up to 480 square metres per charge using their higher-capacity packs — actual area covered varies with grass condition, terrain, and collection load.
Battery shows full charge but the mower stops mid-run
This usually means the BMS is tripping on a voltage sag spike, not actual depletion. On a cutting deck this wide, a sudden load — thick clippings blocking the blade — causes a momentary current surge that the BMS reads as an unsafe drop. Clear the deck, let the pack rest two minutes to recover surface voltage, then restart. If it happens repeatedly on light grass, the pack's internal resistance may be too high and replacement is the correct fix.
Compatible Models
Replaces Part Numbers
Technical Specifications
Product Highlights
- Brand: Gardena
- 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 Gardena PowerMax shuts off halfway through mowing but the battery still shows charge — what's happening?
This is almost always voltage sag under load, not a dead battery. When the mower hits dense or wet grass, current draw spikes and the pack voltage drops below the mower's cutoff threshold — the BMS trips the cell protection and shuts everything down even though resting voltage looks fine. Let the battery sit for five minutes, then check if it restarts easily; if it does, that confirms sag rather than a dead pack. Check resting voltage at the terminals — a healthy 18V Li-ion should read between 19.5V and 21V fully charged.
Replaced the battery and now the mower cuts but the blade feels weak and bogs down in normal grass — worked fine before.
A new battery that causes sluggish blade performance usually means the pack's continuous discharge rating isn't keeping up with the motor's peak draw demand. The PowerMax motor pulls hard at startup and through thick patches, and an undersized replacement cell configuration can't sustain that current without sagging in voltage mid-cut. We tested 18V P4A-platform packs under simulated mowing load and saw blade RPM drop noticeably when continuous discharge rate fell below what the motor needed. Confirm the replacement pack is rated for at least the same capacity class as the original — the 90Wh/5000mAh spec on this product matches the OEM PBA 18V/72 tier, which is what this mower is designed to draw from.
The mower's been sitting in the shed all winter with the battery in it — now it won't turn on at all, charger just blinks and does nothing.
Li-ion cells that sit in a discharged state through a cold winter often drop below the recovery threshold — typically under 2.5V per cell — and the charger's protection circuit refuses to begin a charge cycle because it reads the pack as potentially damaged. This is called deep discharge lockout, and a standard charger will blink or show a fault rather than charge through it. Some P4A-compatible chargers have a recovery or "wake" mode that trickles current at a very low rate to bring cells back above threshold before switching to normal charge. Check the charger's LED behavior against its manual — a fast blink usually means fault, a slow blink on compatible units means recovery mode is active.
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