My neighbor’s 115H sat parked in its station for three days straight last spring, blinking at nobody, while his grass crept past ankle height. He assumed the motor had died. It hadn’t. The battery had quietly dropped below the point where it could carry the mower back to base, and the little machine was stuck making the same short, defeated loop over and over. A ten-minute battery swap fixed what looked like a much bigger problem.
That mix-up is common, so here’s the direct answer first: the Husqvarna Automower 115H uses an 18V lithium-ion battery pack (2.0Ah/36Wh on 2020-and-newer units, part number 593 24 72-01), and most owners can expect 2 to 5 years of service from it before capacity fade makes replacement worthwhile. The battery sits in its own compartment on the underside of the mower and comes out after removing two T20 torx screws, no chassis splitting required.
This guide walks through what battery your 115H actually takes, how to tell it’s failing versus a wiring or wire-loop problem, the real swap steps, what a replacement should cost you, and which in-stock batteries are worth buying.
What Battery Does the Husqvarna Automower 115H Use?
The 115H (2020 and newer) takes an 18V lithium-ion battery rated at 2.0Ah, or 36 watt-hours. Husqvarna’s genuine part number is 593 24 72-01, also listed under 590 21 42-02/03/04 depending on manufacturing batch. This same physical battery is shared across several Husqvarna and Gardena robotic mowers built on the same platform, including the Automower 305, 310, and 315/315X from 2020 onward, plus select Gardena SILENO and Flymo EasiLife models.
One wrinkle worth knowing: Husqvarna changed the internal battery design partway through the 115H’s production run. If your mower has an older serial number, the original battery it shipped with is a different physical pack than the one sold for newer units, so matching the part number on your existing battery matters more than matching the model name alone.
How Long Does an Automower 115H Battery Last?
A healthy Automower battery typically lasts 2 to 5 years under normal seasonal use, and battery specialists who service these mowers generally recommend replacing the pack by the five-year mark regardless of how it’s performing, since lithium cells degrade even when they still technically hold a charge. That estimate lines up with how lithium-ion chemistry behaves more broadly: researchers at the National Renewable Energy Laboratory note that lithium-ion batteries endure a steady strain from time, charge cycles, and environmental conditions that gradually wears them down through degradation, and the rate of that wear depends heavily on temperature, how deeply the battery is discharged, and how fast it’s charged and used.
For a mower battery specifically, that translates to three real-world stressors: a hot garden shed in July, letting the mower run itself fully flat over and over, and leaving it sitting at full charge all winter. None of those will kill a battery overnight, but they all shave months off its working life.
A rough field test: if your battery’s usable capacity has dropped to somewhere around 1,500mAh or lower on a 2,000mAh-class pack, treat it as weak and plan on replacing it soon, since performance tends to fall off a cliff from there rather than tapering gently.
Signs Your Automower 115H Battery Is Failing (Not Charging)
Before you buy a new battery, rule out the two problems that get mistaken for a dead battery constantly: a dirty docking contact and a guide wire fault.
Start with the basics Husqvarna’s own support team recommends. If the mower isn’t charging, keeps leaving the charging station without a full battery, or shows an Empty battery error, check the charging station light first, then check that the mower sits squarely in the station with the charging plates making full contact, clearing away any grass clippings or leaves from the contacts on both the mower and the dock. Battery temperature matters too. The mower simply won’t charge if the pack is outside its accepted temperature range, so a battery that “won’t charge” on a freezing morning may charge fine by afternoon.
The 115H has one quirk other Automower models don’t: it relies entirely on a guide wire (not GPS or a boundary-only signal) to find its way home, so a flashing yellow light on the charging station, which only the 115H is capable of showing, specifically indicates a break in the guide wire rather than a battery problem. If you see that flashing yellow and assume the battery is dead, you’ll replace a perfectly good battery and the mower will still get lost in the yard.
Once wiring and docking are confirmed fine, these point to the battery itself:
- Mowing time per charge has visibly shrunk over a season or two
- The mower starts a job, drains fast, and returns to dock far more often than it used to
- The mower reaches the dock but shows a persistent low or empty battery warning even after a full charging cycle
- The pack is swollen, warm to the touch when idle, or visibly corroded at the terminals (stop using it immediately if so)
Automower 115H Battery Replacement: Step by Step
The 115H is actually one of the easier Automower models to service. On many other Automower models, replacing the battery means splitting the mower’s chassis open. The 115H skips that step entirely because it has a separate compartment for the battery on the bottom of the mower that opens by removing two screws with a T20 torx bit.
- Power the mower off and remove it from the charging station.
- Flip the mower over and clean the area around the battery compartment cover before opening it, to keep dirt and moisture out of the housing.
- Remove the two T20 torx screws and lift the cover off.
- Disconnect the old battery and note the orientation.
- Place the new battery into the holder with the “This side down” label facing up, so it ends up facing downward once the mower is set back on its wheels.
- Reconnect, replace the cover, and reinstall the two screws.
- Set the mower in the charging station and let it complete a full charge cycle before its first mow.
Husqvarna also publishes an official walkthrough video for this exact procedure if you want to watch the process before doing it yourself.
Comparison: OEM vs. Aftermarket Automower 115H Batteries
| Genuine Husqvarna OEM | Aftermarket Replacement | |
|---|---|---|
| Fit and connector match | Guaranteed exact | Usually exact if part number matches, always double-check |
| Capacity | 2.0Ah / 36Wh standard | Often 2.0Ah to 4.0Ah, some run higher capacity than stock |
| Typical price position | Higher | Lower to mid-range |
| Warranty | Manufacturer-backed | Typically 12 months from the seller |
| Best for | Owners who want a factory-identical part | Owners who want a budget option or extra runtime |
Whichever route you choose, match the part number on your existing battery, not just the mower’s model name, since internal revisions exist even within the same model.
How Much Does It Cost to Replace an Automower Battery?
Pricing on both genuine and aftermarket 115H batteries shifts with supply, so rather than quote a number that will be stale by the time you read this, check current listing prices directly (links below). As a general rule, genuine Husqvarna OEM packs sit at the higher end of the price range, while third-party aftermarket batteries built to the same specs undercut them, often with a comparable 12-month warranty. Replacing the battery yourself with a T20 torx driver adds no labor cost; having a dealer do it adds a service fee on top of the part price.
Best Replacement Batteries for the Automower 115H
These are compatible, currently listed batteries built for the 115H’s 18V system. Prices and stock change on Amazon, so confirm the part number against your old battery before buying.
FYIOGXG Cameron Sino Battery, 2500mAh, for Automower 115H: A direct-fit capacity match for the stock pack, with overcharge, over-discharge, and short-circuit protection built in.
FYIOGXG Battery, 4000mAh/72.0Wh, for Automower 115H: Roughly double the stock capacity, worth considering if you want longer unattended mowing time between charges.
Sisawia Replacement Battery, 2500mAh, for Automower 115H: A lower-cost option at the same capacity as stock, backed by a 12-month warranty.
10-Pack T20 Torx Head Screwdriver Bit Set: The exact bit size needed to open the 115H’s battery compartment, useful to have on hand for the rest of the mower’s routine maintenance too.
If you’re also troubleshooting a guide wire break rather than a battery issue, our robot mower troubleshooting guide covers wire-loop diagnostics in more depth.
How to Extend Your Automower 115H Battery Life
Small habits add real months to a lithium battery’s working life, because degradation is driven largely by heat, deep discharges, and charge patterns rather than simple age. A few that matter most for a mower specifically:
- Store the mower somewhere shaded in peak summer heat rather than leaving the charging station in direct sun all day
- Avoid letting the mower run itself completely flat as a routine habit; frequent full discharges accelerate wear
- Don’t leave the mower at 100% charge in storage for months over winter if your model allows a lower storage charge setting
- Keep the charging contacts clean so the mower charges fully and efficiently each time, rather than topping off inconsistently
What to Do With Your Old Battery
Don’t put the old battery in the trash or curbside recycling bin. The EPA specifically warns that lithium-ion batteries that are easily separated from the product, like this one, should be taken to a recycling location found through Call2Recycle or the Earth911 database, or handed to your local household hazardous waste program. Before you transport it, place the battery in its own plastic bag and cover the terminals with non-conductive tape such as electrical tape, since even a used, low-capacity battery can still hold enough charge to spark a fire if the terminals short out in transit.
Key Takeaways
Your Automower 115H uses an 18V, 2.0Ah lithium-ion pack (part 593 24 72-01 on newer units), and it’s genuinely one of the easier Automower models to service since the battery compartment opens with just two T20 torx screws. Expect 2 to 5 years of life from a healthy battery, and before you buy a replacement, rule out a dirty docking contact or a guide wire break, since the 115H’s flashing yellow charging-station light means a wire problem, not a battery problem. When it is time to replace it, match the part number rather than just the model name, and recycle the old pack properly instead of tossing it in the trash.
If you run into a fault that doesn’t match anything here, or you want a second opinion before ordering a part, Flavor Advisor’s team is happy to help you work through it.
Frequently Asked Questions
What kind of battery does the Husqvarna Automower 115H use? The 115H (2020 and newer) uses an 18V lithium-ion battery rated at 2.0Ah/36Wh, Husqvarna part number 593 24 72-01. Earlier serial numbers may use a different physical battery, so match the part number on your existing pack rather than relying on the model name alone.
How long does an Automower 115H battery last? Most owners get 2 to 5 years from a battery before capacity fade makes it worth replacing, with heat, frequent full discharges, and long periods at full charge all shortening that window.
Why is my Automower 115H not charging? Start by checking the charging station light and cleaning the docking contacts on both the mower and station. The mower also won’t charge if the battery is outside its accepted temperature range. If the charging station light flashes yellow, that’s specific to the 115H and indicates a guide wire break, not a battery fault.
Can I replace the Automower 115H battery myself? Yes. The battery sits in its own compartment on the mower’s underside, accessed by removing two T20 torx screws, with no need to open the mower’s main chassis.
How much does it cost to replace an Automower battery? Cost varies by whether you choose a genuine Husqvarna OEM pack or an aftermarket replacement, with aftermarket options generally priced lower for the same capacity. Check current listing prices before buying, since they shift over time.
What does a flashing yellow light on the Automower 115H charging station mean? It’s specific to the 115H and indicates a break in the guide wire, the cable the 115H relies on to navigate back to its charging station.
Is it safe to use a non-Husqvarna replacement battery? Reputable aftermarket batteries built to match the original voltage, capacity, and connector are widely used and generally safe, but Husqvarna’s own documentation notes that product safety is only guaranteed with original manufacturer-recommended batteries, so check seller reviews and certifications (CE, RoHS, ISO) before buying.
How do I know if my Automower battery is actually dead versus a wiring issue? Rule out docking contact cleanliness and guide wire faults first. If the mower charges normally but drains unusually fast, returns to dock far more often than before, or shows persistent low-battery warnings after a full charge, the battery itself is the likely cause.
Can I use a higher-capacity battery than the original in my Automower 115H? Yes, several compatible replacements are available in capacities above the stock 2.0Ah, which can extend mowing time between charges, as long as the voltage and connector match your model.
How do I dispose of an old Automower lithium-ion battery? Never put it in household trash or curbside recycling. Take it to a battery recycling location (searchable through Call2Recycle or Earth911) or your local household hazardous waste program, and tape the terminals with non-conductive tape before transporting it.
Sources
- U.S. EPA, “Used Lithium-Ion Batteries”: https://www.epa.gov/recycle/used-lithium-ion-batteries
- PHMSA, “Transporting Lithium Batteries”: https://www.phmsa.dot.gov/lithiumbatteries
- National Renewable Energy Laboratory, “Artificial Intelligence Models Improve Efficiency of Battery Diagnostics”: https://www.nlr.gov/news/detail/program/2025/artificial-intelligence-models-improve-efficiency-of-battery-diagnostics
- Husqvarna Support, “Automower® won’t charge or shows empty battery error”: https://us-support.husqvarna.com/en/automower/KA-70405
- Husqvarna Support (AU), “Why is the light on the Automower® charging station off?”: https://www.husqvarna.com/au/support/husqvarna-self-service/why-is-the-light-on-the-automower-charging-station-off-ka-70191/
- Husqvarna US, Automower 115H product/support page: https://www.husqvarna.com/us/support/automower-115h/
- Robotic Mower Services, “Different Husqvarna Automower Charging Station LED Colors”: https://www.roboticmowerservices.com/post/different-husqvarna-automower-charging-station-led-colors-what-each-of-them-mean
- Robot Maniak, “Husqvarna 115H Automower Battery Replacement”: https://robotmaniak.com/husqvarna-115h-automower-battery-replacement/