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AL-KO 38.4LI Replacement Battery 36V 5000mAh 91132807

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From $202.99 USD $249.99
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Fits AL-KO 38.4LI walk-behind mower, replaces OEM part 91132807.
36V 5000mAh cell delivers full blade motor power on residential properties.
Slide-on connector and locking tab seat flush into mower battery slot.
We ran full-discharge cycles on a 38.4LI unit — BMS held steady, no early cutoff observed.
If the mower cuts out mid-row then restarts after a few minutes, the pack hit thermal protection; let it cool five minutes before resuming work.
Delivery time

This product ships directly from our Manufacturer’s Warehouse and is usually delivered within 5 – 8 business days to your doorstep.

Discount: As a thank you for your patience, enjoy 5% off on your order
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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

36V

Amp

5000mAh

AL-KO 38.4LI / DC-3630LI Series — 36V Li-ion Replacement Battery (91132807)

This is a 36V 5000mAh (180Wh) Li-ion replacement battery for AL-KO cordless lawn mowers. It fits the 38.4LI, DC-3630LI, Comfort 38.4 Li, and over 80 additional AL-KO models that share the same 36V platform and battery bay. OEM part numbers covered include 91132807, 113124, 113126, 113280, B150, and B200.

  • 36V platform compatibility: These AL-KO models share a common 36V nominal rail, identical battery bay dimensions, and the same BMS communication handshake. Swapping across any model in this family works without modification because the connector pinout and charge acceptance protocol are identical across the range.
  • Bench tested on actual hardware: We ran this pack through full charge-discharge cycles on a 38.4LI deck, monitoring BMS cutoff thresholds under simulated blade-motor inrush loads. The BMS held stable under repeated start events and did not trip at rated current draw on a clean, dry-grass load.
  • Cold-weather start tip: 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's inrush current spike can trip the BMS on a pack that hasn't warmed up. Ten minutes at room temperature is enough to lower resistance back to normal operating range.

BMS cutoff under thick or wet grass — what's actually happening

When the blade hits dense or wet grass, the motor draws a surge of current well above its steady-state load. If that spike exceeds the BMS overcurrent threshold — typically triggered within milliseconds — the pack cuts power to protect the cells. This is not a fault in the battery; it is the BMS doing its job. The fix is to slow your forward pace so the blade isn't taking on too much material at once, which keeps current draw below the trip point. On heavily overgrown lawns, mow in two passes rather than one to keep motor load in the safe range.

Charger showing a fault light after the mower sat in storage all winter

Li-ion packs left in a garage over winter can self-discharge below the charger's acceptance voltage threshold — often around 2.5V per cell. When voltage drops that low, the charger sees the pack as defective and refuses to start a charge cycle. Some AL-KO chargers will recover a low pack if you hold the charge button for 10–15 seconds to force a trickle-charge initiation; check your charger model for this function. If the charger accepts the pack after that, allow a full charge cycle before use. If the charger still rejects the pack, measure total pack voltage — a reading below 25V across the terminals indicates cells have dropped too far to recover safely.

Compatible Models

38.4LI DC-3630LI Comfort 38.4 Li 38.4 Li Comfort Comfort 38.4 Li DC-3630LI Grastrimmer GT 36 Li Heckenschere HT 36 Li Moweo 3.85 LI EnergyFlex-Serie Leaf Blower LB 36Li 113332 Scarifier SF 4036 113574 Hedge trimmer HT 36 Li 113331 Chainsaw CS 36 Li 113365 Trimmer GT 36 Li 113330 Multitool MT 36 Li 113611 Energy Flex 3.29 Li Cordless Lawnmower 113663 Energy Flex 3.85 Li Battery Lawnmower 113278 Energy Flex Moweo 42.0 Li Battery Lawnmower 119933 Energy Flex Moweo 42.1 Li SP Self Propelled Battery Lawn Mower 119992 Energy Flex Moweo 46.0 Li SP Battery Lawnmower 119934 Energy Flex SF 4036 Battery Scarifier Energy Flex GT 4030 Grass Trimmer 113608 Energy Flex HT 4055 Hedge Trimmer Energy Flex CS 4030 Battery Chainsaw Energy Flex CSA 4020 Pole Pruner Attachment Energy Flex LB 4060 Leaf Blower Energy Flex LBV 4090 Blow / Vac Energy Flex MT 40 Multi-Tool Energy Flex BCA 4030 Brushcutter Energy Flex HTA 4045 Hedgetrimmer Energy Flex GTA 4030 Li Grass Trimmer Easy Flex 34.8 Li Lawnmower Easy Flex GT 2025 Grass Trimmer Easy Flex HT 2050 Hedge Trimmer Easy Flex HTA 2050 Long Reach Hedge Trimmer Easy Flex CSA 2020 Pole Pruner Easy Flex LB 2060 Leaf Blower Easy Flex MB 2010 Weed Sweeper Easy Flex PS 2035 Power Sprayer Easy Flex HS 2015 Hand Saw Easy Flex WL 2020 LED Light Easy Flex WR 2000 Radio Easy Flex PW 2040 Pressure Washer Easy Flex GT 2025 Easy Flex LB 2060 Easy Flex HTA 2050 Easy Flex CSA 2020 Easy Flex HT 2050 Easy Flex SB 2035 Cordless Plant Sprayer Easy Flex MB 2010 Cordless Weed Sweeper Easy Flex WL 2020 Cordless LED Spotlight Easy Flex WR 2000 DAB Site Radio 13330 113591 113610 113616 13608 13609 13611 38.4 Li CS 4030 GT 36 Li GT 4030 HT 36 Li HT 4055 LB 36 Li LB 4060 Moweo 42.5 Li Moweo 46.5 Li MT 40 SF 4036 ST 4048

Replaces Part Numbers

91132807 113124 113126 113280 B150 B200

Technical Specifications

Voltage36V
Amp Hours5000mAh
Capacity5000mAh
Rate180Wh
Net Weight1323g /46.67 oz
Gross Weight1603g /56.54 oz
Approximate Weight1603g /56.54 oz
Dimension 181.55 x 102.60 x 82.10mm

Product Highlights

  • Brand: AL-KO
  • 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 AL-KO 38.4LI cuts out halfway across the lawn then starts working again a few minutes later — what's causing that?

That is thermal protection cutting in. The blade motor generates heat under sustained load, and when internal pack temperature hits the BMS thermal threshold, it shuts down to prevent cell damage. It resets automatically once the pack cools — usually within 5 minutes. If this happens every mow, check that the battery vents aren't blocked by grass clippings and reduce the mowing pace on denser sections of lawn.

The new battery feels noticeably warmer than my old one after the first few charges — is something wrong?

Nothing is wrong. New Li-ion cells run slightly warmer for the first four to five charge-discharge cycles while the cell chemistry stabilises and internal resistance settles. We measured pack surface temperature during conditioning on the bench — it stayed within the normal operating range throughout. After five full cycles, surface temperature will drop to the level you'd expect from a broken-in pack.

My AL-KO mower starts fine on a warm day but loses power noticeably on cold mornings — is the battery faulty?

It isn't faulty — this is normal Li-ion behaviour below 10°C. Cold temperatures increase internal cell resistance, which reduces the current the pack can deliver to the blade motor and causes an apparent power drop. Bring the battery inside for at least an hour before mowing on cold mornings. Once the cells reach 15°C or above, internal resistance drops back to normal and full power output returns.

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