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SigmasTek  |  SKU: BW-6939

12V 55Ah High Capacity Lawn Mower Replacement Battery

Sale price $175.48 USD Regular price $232.21
Shipping calculated at checkout.

➤ High performance 12V 55AH capacity for reliable lawn mower operation

➤ Maintenance-free, spill-proof AGM technology for safe and hassle-free use

➤ Wide operating temperature range ensures consistent power in various climates

➤ Guaranteed compatibility with original battery specification and NB terminal type

➤ 1-year warranty and quick 1-day shipping for customer satisfaction and peace of mind


📦🚀 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.

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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 | 55 AH

Terminal Type

Nut & Bolt

12V 55AH Lawn Mower Battery — Compatible Replacement (NB Terminal)

This 12V 55AH Lawn Mower Battery is a high-capacity, high-performance replacement battery engineered to meet or exceed original manufacturer specifications. With a 55 AH rating and robust, high-discharge design, this long-lasting battery provides dependable power for heavy-duty lawn equipment and other demanding applications. Built with SLA chemistry and AGM technology, it offers maintenance-free, spill-proof operation and wide temperature tolerance to ensure reliable performance season after season.

Key Specifications

  • Volts: 12
  • Amps / Capacity: 55 AH
  • Terminal: NB (Nut & Bolt)
  • Weight: 36 Lbs
  • Length: 9.04 inches
  • Width: 5.45 inches
  • Height: 8.15 inches
  • Chemistry: SLA (Sealed Lead Acid)
  • Technology: AGM (Absorbent Glass Mat)
  • Features: Maintenance-free, Spill Proof
  • Compatibility: Guaranteed compatibility with original battery
  • Warranty: 1-year Warranty
  • Shipping: UPS Ground and USPS; ships in 1 business day for in-stock items

Benefits

As a heavy-duty replacement battery, the 12V 55AH Lawn Mower Battery offers extended runtime and strong discharge capability, making it an ideal choice for larger mowers, utility vehicles, and applications that require sustained power delivery. Its AGM design ensures minimal internal resistance, quick recharge rates, and exceptional tolerance to deep-cycle or cyclic use when compared to traditional flooded batteries. The maintenance-free, spill-proof construction minimizes upkeep and simplifies installation — just replace in the original configuration and reuse your existing cables and mounting hardware.

This high-performance battery is also well-suited for broader uses: backup power for UPS units, emergency power for lighting and communications, powering heavy-duty tools, and other off-grid or mobile power applications. The combination of high amp-hour capacity, dependable NB-style terminals, and rugged SLA/AGM construction delivers a long-lasting battery solution you can trust for demanding jobs and seasonal workloads. With a 1-year warranty and guaranteed compatibility, you’ll have reliable protection and support after purchase.

Need more than one? Batterysharks.com offers quantity discounts for bulk orders — submit an RFQ and a representative will help. Buy the 12V 55AH Lawn Mower Battery (NB) now to upgrade to a high-performance, long-lasting battery with fast shipping and confident compatibility.


Payment & Security

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