Eufy Vacuum Batteries

Eufy Vacuum Batteries: Choose, Replace, and Maintain

Eufy vacuum batteries power RoboVac and HomeVac models with lithium‑ion cells designed for steady suction and safe operation. Use this guide to pick the right pack, estimate runtime, replace it safely, and extend its lifespan.

How to Choose the Right Battery

1. Confirm your exact model: Check the label on the bottom of the robot or on the stick vacuum battery/handle (e.g., RoboVac 11S, 15C, 30C, G series; HomeVac S11/S12).

2. Match voltage and connector: Most RoboVac packs are 14.4–14.8 V Li‑ion with a dedicated plug; many stick vacs use 25.2 V removable packs. The connector shape and wire count must match your model.

3. Pick capacity for your needs: Higher mAh means longer runtime but often longer charge time and slightly higher weight. Common ranges: 2600–5200 mAh for robot vacs; 2000–2500 mAh for stick vacs.

4. Check physical fit: RoboVac packs sit in a battery bay with screws; stick vac packs slide or latch into the handle. Ensure the pack is listed as compatible with your model number.

5. Prefer certified parts: Look for safety certifications and a clear return/warranty policy, especially if buying third‑party replacements.

Typical Specs and What to Expect

Actual performance varies with floor type, suction mode, filter cleanliness, and brush/roll resistance.

When to Replace Your Battery

• Runtime has dropped by 30% or more under the same cleaning settings.
• The vacuum returns to the dock more often or shuts off unexpectedly.
• Charging takes unusually long or the charge indicator fluctuates.
• The pack is swollen, hot to the touch, or shows damage—replace immediately and stop using.

Replacement Steps

RoboVac (most models)

1. Power off the robot and remove it from the dock.
2. Flip it over on a soft surface and remove the battery door screws.
3. Unplug the battery connector by the plastic housing (do not pull wires).
4. Seat the new pack, connect firmly, and reinstall the door and screws.
5. Place on dock and charge fully before first use (allow 4–6 hours).

HomeVac Stick (e.g., S11/S12)

1. Power off and remove any attachments.
2. Press the battery release latch and slide the pack out.
3. Insert the new pack until it clicks; confirm a secure fit.
4. Charge fully before use (typically 3–4 hours).

Estimated time: 5–10 minutes for RoboVac; under 2 minutes for stick vacs.

Care and Safety Tips

• Charge after each use; avoid storing fully empty for long periods.
• If storing more than a month, leave at about 40–60% charge and top up every 2–3 months.
• Keep vents, filters, and brushes clean to reduce load and extend runtime.
• Operate and charge at room temperature (roughly 50–86°F / 10–30°C).
• Use the original charger/dock; do not puncture, crush, or short the pack.
• Recycle responsibly at a battery collection point; do not dispose in household trash.

Choose This If / Avoid This If

Choose a higher‑capacity battery if:

• You clean larger spaces or mostly use higher suction modes.
• You want fewer dock returns during a single session.

Avoid higher capacity if:

• You mostly clean small areas and want the quickest recharge times.
• Your model has tight battery bay tolerances and only supports the original size.

Alternatives and Compatibility Notes

• Genuine vs third‑party: Third‑party packs can be cost‑effective, but verify voltage, connector, dimensions, and that the protection board (BMS) is compatible with your model.
• Mixing revisions: Do not combine cells or modules from different packs. Replace the entire pack as one unit.
• Firmware features: Some models adjust suction automatically; higher suction shortens runtime regardless of battery capacity.

FAQ