Quick Answer: Store your robot mower indoors, above freezing (0°C/32°F per Husqvarna’s official guidance), and charge the battery higher than generic lithium-battery advice suggests — Husqvarna and Worx both say fully charge it, Segway Navimow specifies at least 85%, and Mammotion’s official minimum is 80%. That’s a real, brand-verified split from the “40-60%” storage advice floating around generic battery sites, and getting it wrong accelerates battery aging over a 4-6 month off-season. Clean the mower and charging station first, and recharge every 60-90 days if you’re not using hibernation mode.
Search around for “how to store a lithium battery for winter” and you’ll find a consistent answer: charge to 40-60% and leave it be. That advice is correct for a power tool battery sitting in a drawer — it is not what the robot mower manufacturers themselves tell their own customers. We checked Husqvarna, Worx, Segway Navimow, and Mammotion’s official support documentation directly, and all four specify a materially higher charge target for winter storage than the generic advice. Here’s what each brand actually says, and the full prep checklist that goes with it.
Winter storage charge targets, by brand
- Husqvarna Automower — full charge. Husqvarna’s official winter storage guide instructs owners to “fully charge your mower and switch it off before storage.” Most current models (the iQ-series) need no mid-winter top-up at all; some older models require recharging every three months per their specific manual.
- Worx Landroid — full charge, then top up every 2 months. Worx’s maintenance documentation calls for a full charge before storage, removing the battery from the mower chassis, and recharging it roughly every two months through winter to prevent deep discharge.
- Segway Navimow — 85% minimum, hibernation mode preferred. Segway’s official X3 and i-Series winter storage guides specify charging to at least 85% before storage. Navimow’s hibernation mode is built specifically to manage this automatically; without it enabled, plan on a manual recharge roughly every three months.
- Mammotion LUBA/YUKA — 80% minimum, recharge every ≤90 days. Mammotion’s official winter maintenance guide for the LUBA 2 AWD X sets an 80% minimum state of charge before storage, with a recharge back to 80%+ at intervals not exceeding 90 days during the off-season.
Notice the pattern: nobody says 40-60%. Every brand that publishes official guidance sets the bar at 80% or higher — two of the four say charge it fully. A mid-charge lithium battery sitting at room temperature for months is fine for a phone or a drill; robot mower manufacturers have decided their own battery packs and BMS (battery management system) handle a higher sustained charge better through a long, cold, unused season.
| Brand | Storage charge target | Recharge interval | Remove battery? |
|---|---|---|---|
| Husqvarna Automower | 100% (full charge) | None for most current models; every 3 months for some older models | No |
| Worx Landroid | 100% (full charge) | Every 2 months | Yes, recommended |
| Segway Navimow | ≥85% | ~3 months if hibernation mode is off | No |
| Mammotion LUBA/YUKA | ≥80% | Every ≤90 days | No |
Robot Lawn Mower Winter Storage Bag / Cover
- Use a breathable cover, not plastic sheeting — trapped moisture around a stored mower promotes corrosion on contacts and the blade disc.
- A padded bag also protects the RTK antenna module on wire-free models like Navimow and LUBA during handling.
- Pair with the connector box below if you're storing a wired (boundary-wire) model.
Getting your mower packed away before the first real freeze shouldn’t mean waiting on ground shipping for a storage cover or connector box — start a free Audible trial for something to listen to while you handle the twenty-minute prep job below.
Wire Connector Box (for boundary-wire models)
- Husqvarna's own winter guide specifically recommends a connector box to organize and protect wire ends, plus labeling each one for spring reconnection.
- Skip this step entirely if you run a wire-free RTK mower (Segway Navimow, Mammotion LUBA/YUKA) — there's no boundary wire to protect.
- A $10-15 box now avoids a confused, unlabeled tangle of wire ends in spring.
Full winter prep checklist
- Clean the mower and charging station thoroughly. Husqvarna’s guide calls for a deep clean of both — chassis, wheels, blade disc, and charging contacts — before storage, not just the mower.
- Replace worn blades and screws. Fresh blades resist rust better than worn ones sitting idle for months, and you start spring with sharp cutting edges instead of remembering to swap them in April. See our blade replacement guide for brand-specific intervals and kit pricing.
- Charge to your brand’s target — not the generic 40-60%. Full charge for Husqvarna and Worx, 85%+ for Navimow, 80%+ for Mammotion. Switch the mower off, not just idle.
- Remove the battery if you own a Worx Landroid. Worx is the one major brand that explicitly recommends pulling the battery from the chassis for storage; the others are designed to store charged in-unit.
- Protect boundary-wire connectors (wired models only). Use a connector box and label each wire — see the product above. Wire-free RTK models skip this step.
- Store indoors, above freezing. A garage, shed, or basement that stays above 0°C/32°F is the minimum bar per Husqvarna’s official guidance; a heated space in the 10-20°C (50-68°F) range is better for long-term battery health.
- Set a recharge reminder. Every 2 months for Worx, roughly every 3 months for Husqvarna (older models) and Navimow (without hibernation mode), and no later than every 90 days for Mammotion. A phone calendar reminder is enough — this is the step owners most commonly skip, and the one most likely to cause deep-discharge battery damage.
- Bring the RTK antenna or 4G module in with the mower (wire-free models). Don’t leave it mounted outside through winter weather just because it’s rated for the elements.
What happens if you get it wrong
A lithium battery left at a very low charge through months of cold storage undergoes accelerated capacity loss — the cells degrade faster than they would sitting at a higher, brand-recommended charge, and in worst cases a deeply discharged pack can drop below the safe voltage floor the BMS needs to recharge it at all, effectively bricking it. That’s the entire reason all four brands publish a specific number instead of leaving it to owner judgment: the cost of guessing wrong is a $150-400+ replacement battery pack, not just a shorter runtime.
Where this fits with the rest of ownership
Winter storage is one line item in the broader maintenance schedule — this guide goes deeper on the one step (battery charge level) where brand guidance genuinely diverges from generic advice. If you’re also deciding where the mower docks day-to-day, see our charging station guide for keeping contacts corrosion-free, or the garage/dock cover guide for year-round weather protection. For the full cost picture across the ownership lifecycle, including battery replacement, see our robot lawn mower cost breakdown.
Still shopping for the mower itself? Start with the best robot lawn mower rankings.
The bottom line
Ignore the generic “40-60%” lithium storage advice for your robot mower — every major brand’s own documentation sets the winter storage charge higher: full charge for Husqvarna and Worx, 85%+ for Segway Navimow, 80%+ for Mammotion. Clean the mower and station, replace worn blades, protect boundary-wire connectors if you have them, store indoors above freezing, and set a reminder to recharge every 2-3 months. Follow your specific brand’s number and your mower’s battery — the single most expensive component to replace — will still be healthy when mowing season starts back up.