Friendly Robotics Robomower RL550 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 RL550 Lawn Mower Batteries (Replacement) - Compatible with RL550
Renew the power of your Friendly Robotics Robomower RL550 with a top-quality replacement battery engineered for steady output and dependable longevity. This replacement battery is fully compatible with the RL550 model and provides the deep-cycle capacity and spill-proof safety needed for regular mowing tasks. As a high-performance battery option, it restores runtime, improves charge acceptance, and delivers the long-lasting battery life you expect from premium AGM technology.
Key Specifications
- Model Compatibility: Friendly Robotics Robomower RL550
- 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
Designed to withstand outdoor use, the RL550 replacement battery provides robust durability and dependable energy for routine and heavy mowing. AGM design prevents acid leakage and supports vibration resistance, while the valve-regulated, spill-proof construction adds a layer of safety and practicality. The deep-cycle characteristics extend usable life through many charge cycles, making this a long-lasting battery investment.
The high-performance battery profile ensures consistent power delivery and efficient energy storage, delivering more usable runtime per charge in a compact format. Certified for safety and offered brand new with a 1 year warranty, these replacement units give you confidence when returning your RL550 to full capability. In addition to robotic mowers, AGM deep-cycle batteries are commonly used in UPS systems, emergency power backups, and to run portable tools and DC devices that need reliable, continuous power.
Installation is user-friendly: retain your original wiring and hardware and secure the new batteries using the nut & bolt terminals. If your RL550 struggles with reduced performance or shortened run times, replacing the pair of SP12-18HR batteries is a simple and effective remedy.
Take action now—purchase your replacement Friendly Robotics Robomower RL550 batteries to get back to efficient mowing with a long-lasting, high-performance battery solution. Fast shipping and dependable customer support are available.
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Payment & Security
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