Friendly Robotics Robomower RL850 High Performance Lawn Mower Replacement Battery
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⚠️ Quick Reminder
🔹 Please ensure the original battery model number is listed in our product description and that your device model number matches for compatibility.
🔹 We only supply the batteries shown in the images. Device images are provided for reference only.
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Battery Care Guide
Battery Care Guide
Battery Usage and Maintenance Guidelines 🔋
Please read the following instructions carefully before using your new battery. Proper adherence will help ensure optimal performance and extended service life.
1. Cordless Phones, PDAs, and Power Tools (NiMH, NiCd, Lithium-Ion) 📱
Initial Charge
- Fully charge the battery overnight prior to first use.
Conditioning (First 2–6 Charge Cycles)
- Operate the device until the battery reaches approximately 20% capacity.
- Avoid premature recharging.
- Do not allow the battery to fully discharge during the initial cycles.
Post-Conditioning
- Recharge the battery only when necessary.
- These batteries are capable of approximately 500 charge cycles:
- Once daily → ~500 days
Twice daily → ~250 days
Note: Even a partial recharge is considered a full cycle.
2. Sealed Lead Acid (SLA) Batteries 💡
- No conditioning required.
- Maintain the battery in a fully charged state; avoid complete discharge.
- Capable of 300–400 charge cycles.
- Expected service life: 2–3 years, depending on usage conditions.
3. Laptop Batteries (Lithium-Ion) 💻
Initial Charge
- Fully charge the battery overnight prior to first use.
Conditioning (First 2–6 Charge Cycles)
- Charge fully, then discharge to approximately 20% capacity.
- Avoid complete discharge, as some devices may not detect a fully drained battery.
Post-Conditioning
- Minimize frequent plugging and unplugging.
- Allow the battery to discharge moderately at least once per month to maintain optimal performance.
- Occasional cycling is recommended to sustain battery health.
Professional Recommendation
Adhering to these guidelines will enhance battery longevity and ensure reliable performance.
For further assistance regarding your battery or order, our customer support team is available to provide guidance.
Delivery and Shipping
Delivery and Shipping
⚡ Everything You Need to Know About Shipping with BatteryWeb (USA)
We know reliable delivery matters when you need power fast. Here’s how BatteryWeb makes shipping easy across the USA:
🚚 Shipping & Delivery
Most orders ship next business day (some products like sealed lead acid may take a little longer).
Same-day shipping available if you order before 11:59 AM (delivery depends on the carrier).
We ship nationwide using FedEx, UPS, USPS, DHL, and regional ground carriers.
Shipping costs are calculated automatically at checkout based on weight, distance, and carrier.
Transit times shown are estimates only (business days, no weekends/holidays).
🌍 Shipping Restrictions
Lithium batteries cannot be shipped by USPS or air. They must go via FedEx Ground, UPS Ground, or DHL Ground.
PO Box deliveries are only available via USPS.
At this time, we do not ship lithium batteries to Puerto Rico. NiMH, NiCd, and Alkaline can be shipped.
📦 Important Notes
Double-check your shipping address! If an incorrect address is used and the order is returned, re-shipping costs are the buyer’s responsibility.
If a product is temporarily out of stock, we’ll notify you right away with the expected restock date—or issue a refund if you prefer.
💲 Currency & Pricing
All prices are shown in USD.
Orders shipped outside the USA may be subject to local taxes, customs fees, or import duties. These are the buyer’s responsibility.
⚡ At BatteryWeb, we’re committed to getting your batteries delivered quickly, safely, and affordably—so you’ll always have the power you need, when you need it.
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.
🔹 Our products are generic replacement parts and are not affiliated with, endorsed by, or manufactured by the original equipment manufacturers (OEMs).
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.
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