Rechargeable Window Cleaning Robot
Model:309 Pro
LIESA supplies the rechargeable window cleaning robot from Qingdao, China, with a built-in cell that is charged between cycles and holds the unit on the glass if the mains supply is interrupted. The same cell supports cable-free use and the backup hold function. Liesa Intelligent Technology has built household cleaning appliances in Qingdao since 2014, and supplies the model with OEM branding.
The Rechargeable Window Cleaning Robot uses a built-in battery for normal operation and as a backup power source when the main supply is interrupted. This allows the robot to remain supported on the glass while the operator responds to a power loss.
For LISA, a China supplier of window cleaning robots, battery capacity should be considered together with backup duration. Runtime shows how long the robot operates during normal cleaning, while backup duration indicates how long the battery can support the unit when external power is unavailable.
Runtime and Backup Hold Are Different Figures
Runtime is measured with the pump and the drive running together, which is why it falls as suction duty rises on a wet or large pane. Backup hold is measured with the rechargeable window cleaning robot stationary and only the pump active, holding against the glass after the supply is cut. The second figure is longer because the drive is idle.
That distinction matters when a buyer compares models. A long hold period is not a long cleaning cycle, and a long cleaning cycle does not guarantee a long hold. The two are quoted side by side in the specification table for exactly that reason.
Specifications
| Overview | Model | 309 PRO | |
| Product Name | Rechargeable Window Cleaning Robot | ||
| Color | White / Pink | ||
| Appearance (Design Rendering) | |||
| Packing List | Main Unit (with built-in battery pack) × 1, Power Adapter × 1, AC Power Cord, DC Extension Cord × 1, Cleaning Cloths × 8, Safety Rope × 1, Remote Control × 1, User Manual × 1, Spray Bottle × 1, Battery × 1 | ||
| Detailed Specifications | |||
| Package | Color | White / Pink | |
| Main Unit Dimensions (L×W×H) mm | 269*136*78 | ||
| Main Unit Material | ABS+PC | ||
| Main Unit Net Weight (kg) | 1.18 | ||
| Overall Gross Weight (incl. 1-in-1 Master Carton, kg) | 2.45 | ||
| Color Box Dimensions (L×W×H) mm | 320x86x287mm | ||
| 1-in-1 Master Carton Dimensions (L×W×H) mm | 335x96x315mm | ||
| 5-in-1 Master Carton Dimensions (L×W×H) mm | 505x350x335mm | ||
| Function | Operating Mode | 1. Clean Upwards 2. Clean Downwards3. Clean Leftwards 4. Clean Rightwards 5. Spot Cleaning6. X1 Mode Cleaning (Dry/Wet Mopping; adjustable water volume for wet mopping—Small/Large—with Small as default) 7. X2 Mode Cleaning (Dry/Wet Mopping; adjustable water volume for wet mopping—Small/Large—with Small as default) | |
| Backup Battery Charging Time (h) | Approx. 2.5 hours | ||
| Backup Battery Runtime (min) | 20–30 minutes | ||
| Operating Noise (dB) | Approx. 68 dB | ||
| Operating Temperature & Humidity Range (°C / %) | 0–40°C; ≤85% RH | ||
| Operating Speed (min/m²) | Approx. 4 min 40 sec per square meter; one full water tank covers 18 square meters | ||
| Rated Power (W) | 72 W | ||
| Rated Voltage (V) | 24 V | ||
| Unit Lifespan (h) | ≥400 Pa | ||
| Suction Motor Speed (rpm) | 29,000 RPM ±10% | ||
| Speed Settings | Automatic Adjustment | ||
| Vacuum Pressure (Pa) | 2000–3200 RPM (Variable Frequency) | ||
| Manual Update (Firmware) | Yes | ||
| Low Battery Alarm | Yes (Buzzer) | ||
| Control Method | Remote Control (2.4G) — Controllable range: up to 25 meters | ||
| Minimum Working Surface Size (cm) | 30*30 | ||
| Water Spray Settings | 2 Levels | ||
| Water Spray Volume (ml/spray) | Small Setting: Approx. 0.06 ml/s; Large Setting: Approx. 0.09 ml/s | ||
| Water Spray Method | Atomizing Nozzle (Bi-directional Spray) | ||
| Water Level Detection | None | ||
| Applicable Surfaces | Glass, tiles, wooden doors, marble walls, and other smooth vertical surfaces | ||
| Structure | Solenoid Valve | Voltage | 24V |
| Indicator Light | Battery Indicator / Meaning of Indicator Light Colors | Yes | |
| Water Tank | Capacity (ml) | 60 ml | |
| Motor | Suction Motor Type | Brushless DC Motor | |
| Drive Wheel Motor Type | Brushed DC Motor | ||
| Battery | Battery Capacity (mAh) | 650 | |
| Battery Type | Lithium-ion Cells | ||
| Charging Current (mA) | Approx. 300 (at constant current) | ||
| Accessories | Adapter | Output Parameters: Voltage (V), Current (A) | 24V 3A |
| Input Parameters: AC (V), Frequency (Hz), Current (A) | AC 100–240V, 50/60 Hz, 2.5A | ||
| Safety Rope | Safety Rope Load Capacity (Kgf) | 150 | |
| Safety Rope Length | 5 m | ||
| Cleaning Cloth | Quantity | 8 Blades | |
| Other | Sensor | Distribution and Category | 1. 6-axis sensor (on the mainboard) 2. Barometric pressure sensor (on the button board) |
| Certification | CE | YES | |
| KC | YES | ||
Charging Arrangements Compared
| Arrangement | Charging method | Practical note |
| Direct adapter | Lead plugs into the body | Simple, no dock needed |
| Charging dock | Unit sits on the dock | Doubles as storage |
| Dock with backup hold | Charges and holds on mains failure | Safety function plus convenience |
| Dock with spare cell | Second pack charged off the unit | Whole-house sessions |
The third row is the arrangement used where the backup function is treated as a safety feature rather than a convenience.
Charging Routine and Cell Service Life
Three habits decide how long the cell lasts: charge after use, avoid charging in direct sun on a balcony, and do not store the rechargeable window cleaning robot flat for a season. The manual states the storage charge level for the market, and it is the same advice used across the cordless cleaning appliances in the range.
The charge indicator is worth explaining at handover. The low-battery warning sounds before the cell is exhausted, so a tall pane can be finished or the unit brought down.
OEM and Order Notes
The rechargeable window cleaning robot is supplied as OEM work on body colour, logo, carton artwork, manual language, charging configuration, cell capacity and accessory sets. Runtime and backup hold figures are confirmed on pre-production samples for the destination market. Minimum order quantity, tooling and lead time are confirmed with the quotation.
Contact: Liesa Intelligent Technology (Qingdao) Co., Ltd., Qingdao, China | www.liesagadget.com. Factory address and full contact details are provided with the quotation.
FAQ
Q: What is the difference between runtime and backup hold on the rechargeable window cleaning robot?
A: Runtime is a full cleaning cycle with the pump and drive running. Backup hold is the stationary period the cell keeps the unit on the glass after a power interruption, with the drive idle.
Q: Is the cell replaceable?
A: On most models the cell is built in and serviced by a technician rather than removed by the user, and the arrangement for the market is stated on the specification sheet.
Q: How long does charging take?
A: Charge time is stated per model, and a dock keeps the unit charged between cycles so a full session does not wait on a charge.
Q: Can it be used on frameless glass?
A: Yes, on smooth glass where an airtight seal can be established, and edge sensing handles panes without a frame reference.
Q: What maintenance does the cell need?
A: Charge after use, avoid direct sun while charging, and follow the storage charge recommendation if the unit is put away for a season.
Q: What is needed to quote?
A: The market, charging configuration, cell capacity, runtime and hold requirements, colour, quantity and packaging format.
Send Inquiry
Contact Info
-
Address
No.1, Keyuan Wei 1st Road, Laoshan District, Qingdao City, Shandong Province, China
-
Tel
-
Email
Welcome to our website! For inquiries about our products or pricelist, please leave your email to us and we will be in touch within 24 hours.
Related Products
News Recommendations
