Friendly Robotics Robomower RL850 High Performance Lawn Mower Replacement Battery 25.32 lb
— Ready to ship immediately
Check that your old battery model number and device model to match our description. This makes sure they work together.
We ship your order same day if you buy it before 4 PM EST.
Friendly Robotics Robomower RL850 High Performance Lawn Mower Replacement Battery is backordered and will ship as soon as it is back in stock.
Let customers speak for us
Send Your Battery Photo
Expert Technician Help
Snap a photo or video of your battery and send it to us. We'll identify the exact replacement—fast and hassle-free. Our team has helped thousands of customers find the right battery quickly and easily.
POST YOUR BATTERY IMAGE
Product & Solutions Expert
✉ sales@batteryweb.com
Battery Care Tips
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
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
⚠️ 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.
Volts & Amps
12 Volts | 18 Ah
Terminal Type
Nut & Bolt
Friendly Robotics Robomower RL850 Lawn Mower Batteries (Replacement) - Compatible with RL850
Restore peak performance to your Friendly Robotics Robomower RL850 with a brand new replacement battery engineered for dependable runtime and rugged reliability. This replacement battery is fully compatible with the RL850 model, offering consistent power delivery, deep-cycle endurance, and spill-proof safety. Whether you need to replace aging cells or keep a backup on hand, this high-performance battery brings renewed efficiency and a long-lasting battery life to your robotic mower.
Key Specifications
- Model Compatibility: Friendly Robotics Robomower RL850
- Required Quantity: 2 batteries - SP12-18HR (12 V 18 AH)
- Voltage: 12 Volts
- Capacity: 18 Ah (Amp-hours)
- Battery Type: Absorbent Glass Mat (AGM) Technology
- Usage: Designed For Deep Cycle Usage
- Construction: Valve Regulated Spill Proof Construction
- Energy Density: Power/Volume Ratio Yielding Unrivaled Energy Density
- Certifications: U.L. Recognized and CE Certified
- Condition: Brand New, Factory Fresh
- Warranty: 1 Year Warranty
- Terminal Style: Nut & Bolt
- Brand: Friendly Robotics (replacement)
- Performance: Performance Guaranteed
Benefits
Built to last, this replacement battery offers exceptional durability for the outdoor demands of the RL850. AGM construction provides vibration resistance and leak-proof operation, while the valve-regulated design ensures safe use in multiple orientations—ideal for robotic lawn mowers. The deep-cycle capability means the battery tolerates repeated discharge/recharge cycles without premature capacity loss, delivering a long-lasting battery life that reduces downtime and extends mowing seasons.
As a high-performance battery option, the RL850 replacement delivers optimized power-to-size ratio, giving you more runtime per charge. Safety certifications (U.L. and CE) and factory-fresh condition back up the product’s reliability, and the included 1 year warranty provides extra peace of mind. These features also make AGM deep-cycle batteries well-suited for UPS backup, emergency power reserves, and powering portable tools or DC equipment that demand steady, dependable current.
Installation uses your original cables and hardware—simply attach via nut & bolt terminals to restore full functionality. If your RL850 is showing reduced run time or slow charge acceptance, replacing the batteries with these SP12-18HR units is an effective, affordable way to return it to reliable operation.
Don’t wait—purchase your replacement Friendly Robotics Robomower RL850 batteries today and get back to efficient mowing with a long-lasting, high-performance battery solution. Fast shipping and reliable support are available now.
Technical Specifications
Product Highlights
- Brand Replacement : Friendly Robotics Robomower
- Manufacturer: SigmasTek
- Product Type: Home Power Backup
- Warranty: 12 Months
- Bulk Orders: sales@batteryweb.com
Payment & Security
Payment methods
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
