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SigmasTek  |  SKU: BW-8016

Ultracell UL18-12 High Performance Lawn Mower Replacement Battery

Sale price $59.85 USD Regular price $79.20
Shipping calculated at checkout.

➤ Factory fresh Ultracell UL18-12 battery ensures reliable performance

➤ 100% compatible with original Ultracell UL18-12 Lawn Mower model

➤ Absorbent Glass Mat (AGM) technology for enhanced durability

➤ Valve regulated, spill-proof design for safe and maintenance-free use

➤ Backed by a 1-year warranty and guaranteed performance


📦🚀 FAST SHIPPING: Usually ships same day if ordered before 2 PM EST

⚠️ 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.

📸 Send Your Battery Photo / Unsure? Expert 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.
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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

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: 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

Ultracell UL18-12 Lawn Mower Replacement Battery (Ultracell UL18-12)

Replace a tired battery in your Ultracell UL18-12 with this brand new Ultracell UL18-12 replacement battery that emphasizes compatibility, safety, and consistent deep-cycle performance. Engineered as a 100% compatible swap for the Ultracell UL18-12, this battery offers the reliable power delivery needed for steady lawn mower operation and dependable runtime under regular use.

Key Specifications

  • Brand: Ultracell (replacement Ultracell UL18-12 battery)
  • Compatible Model: Ultracell UL18-12
  • Required Quantity for Unit: 1 battery (SP12-18 NB)
  • Model Number: SP12-18 NB
  • Voltage: 12 Volts
  • Capacity: 18 Ah
  • Terminal Type: Nut & Bolt
  • Battery Technology: Absorbent Glass Mat (AGM)
  • Usage Type: Designed for Deep Cycle Usage
  • Construction: Valve Regulated, Spill Proof
  • Performance/Design Note: Power/Volume Ratio Yielding Unrivaled Energy Density
  • Certifications: U.L. Recognized and CE Certified
  • Condition: Brand New, Factory Fresh
  • Warranty: 1 Year Warranty
  • Compatibility Note: 100% compatible with Ultracell UL18-12; reuse existing cables and hardware to connect

Benefits

This replacement battery offers strong durability thanks to AGM construction and a valve-regulated, spill-proof design that minimizes maintenance and maximizes safety. Built for deep-cycle service, it endures the repeated charge and discharge cycles common to lawn mower operation while providing stable voltage and reliable runtime.

As a high-performance battery option, the Ultracell UL18-12 replacement balances energy density with compact form so you get effective runtime without sacrificing space. Its certifications (U.L. recognized and CE certified) and factory-fresh condition offer peace of mind for safe, consistent operation.

This long-lasting battery is well-suited not only for lawn mower use but also for backup and portable power roles including UPS systems, emergency backup power, scooters, and other small electric equipment where dependable power and deep-cycle endurance are required.

Ready to get reliable power back in your Ultracell UL18-12? Order this Ultracell UL18-12 replacement battery today for a high-performance, long-lasting battery backed by a 1 year warranty and fast shipping.


Payment & Security

Payment methods

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