Welcome to our store. Your trusted source for batteries and power solutions. Learn more

For support or quotes: sales@batteryweb.com

WELCOME5
SigmasTek  |  SKU: BW-7038

Yard Man 999 Reliable Lawn Mower Replacement Battery 24.72 lb

19% off
New arrival
Sale price $122.99 USD Regular price $151.99
Shipping calculated at checkout.
Factory fresh Yard Man 999 replacement battery for reliable performance
12V 35AH capacity designed for deep cycle usage and long life
Absorbent Glass Mat (AGM) technology ensures spill-proof and maintenance-free operation
Valve regulated design provides safety and durability under heavy use
1-year warranty with U.L. recognized and CE certified quality assurance
In stock

— Ready to ship immediately

Free shipping

Visa Mastercard American Express PayPal Apple Pay Google Pay Shop Pay Discover Klarna Afterpay Stripe

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.

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

Product & Solutions Expert

✉ sales@batteryweb.com

🔹 10+ Years Battery Experience 🔹 Fast & Accurate Identification

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

🔹 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: 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 | 35 AH

Terminal Type

Nut & Bolt

Yard Man 999 Lawn Mower Battery (Replacement) - Compatible with Yard Man 999

Replace your worn-out power source with this factory-fresh, high-quality replacement battery built for the Yard Man 999. Engineered to deliver dependable performance, this battery offers the reliable starting power and deep-cycle capability your Yard Man 999 lawn mower demands. Whether you need a dependable start after storage or consistent run time while mowing, this high-performance battery is designed to keep your mower working season after season. If you want a long-lasting battery that matches OEM fit and performance, this SP12-35 NB (12 Volts 35 AH) unit is a straightforward swap using your existing cables and hardware.

Key Specifications

  • Compatible Model: Yard Man 999
  • Replacement Model Number: SP12-35 NB
  • Voltage: 12 Volts
  • Capacity: 35 AH
  • Terminal Type: Nut & Bolt
  • Technology: 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
  • Performance: Performance Guaranteed

Benefits

  • Durability: AGM construction and valve-regulated design create a spill-proof, robust battery that resists vibration and corrosion for longer service life.
  • Long Life: Designed for deep cycle usage, this long-lasting battery sustains repeated discharge/recharge cycles, providing more usable life in lawn mower applications.
  • High Performance: High energy density and optimized power-to-volume ratio deliver strong cranking power and steady output for cutting, engaging blades, and powering onboard electronics.
  • Safe and Certified: U.L. recognition and CE certification ensure the battery meets industry safety and quality standards for residential and professional use.
  • Simple Replacement: Direct replacement for the Yard Man 999 using the existing cables and hardware — no modification required.
  • Common Applications: Ideal for lawn mowers (like the Yard Man 999), outdoor power equipment, small utility vehicles, and other 12V deep-cycle uses such as backup power for small systems.
  • Reliable Support: Backed by a 1 Year Warranty and performance guarantee for peace of mind.

Upgrade today to this replacement battery for your Yard Man 999 and experience the difference a high-performance battery makes. Order now to secure a long-lasting battery that ships quickly and gets you back to mowing with confidence.

Technical Specifications

Voltage12 Volts
Amp Hours35 AH
Terminal TypeNut & Bolt
Length (in.)7.72
Width (in.)5.14
Height (in.)6.22
Weight (lb.)24.7

Product Highlights

  • Brand Replacement : Yard Man 999
  • Manufacturer: SigmasTek
  • Product Type: Home Power Backup
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

Payment & Security

Payment methods

  • American Express
  • Apple Pay
  • Bancontact
  • Diners Club
  • Discover
  • Google Pay
  • Mastercard
  • PayPal
  • Shop Pay
  • Visa

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.