Firman 4550W Portable Generator 12V 9Ah SLA Compatible Replacement Battery - 2-Pack 8.17 lb
— Ready to ship immediately
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.
Firman 4550W Portable Generator 12V 9Ah SLA Compatible Replacement Battery - 2-Pack is backordered and will ship as soon as it is back in stock.
Let customers speak for us
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
✉ sales@batteryweb.com
Battery Care Tips
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
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
⚠️ 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
6 Volts | 12 Ah
Terminal Type
F1
12V 9AH SLA Battery Replacement for Firman 4550 Watt Portable Generator (2-Pack)
Upgrade and maintain your Firman 4550 Watt Portable Generator with a dependable 2-pack of 12V 9AH SLA replacement battery units. These batteries are engineered as direct replacements for the factory-installed batteries and are built to deliver the reliable starting power and consistent performance required for portable generators. Designed to meet or exceed OEM specifications, this replacement battery pack gives you confidence that your generator will start smoothly when it matters most.
Key Specifications
- Compatibility: Firman 4550 Watt Portable Generator
- Voltage: 12V
- Capacity: 9AH
- Chemistry: Sealed Lead Acid (SLA), maintenance-free
- Package: 2-pack
- OEM Compatibility: Designed to meet or exceed original factory specifications
- Additional notation from product text: 12V 9AH SLA Battery Replacement For Firman 4550 Watt Portable Generator - 2 Pack6 Volts12 AhF1
Benefits
- Durability: Robust sealed construction handles the rigors of portable generator use, including vibration and frequent starting cycles.
- Long life: The maintenance-free SLA design supports consistent capacity over time, giving you a long-lasting battery solution for standby and regular operation.
- High performance: Provides the high cranking power needed for quick and reliable starts so the Firman generator powers up when required.
- Maintenance-free convenience: Sealed lead acid technology means no watering or routine maintenance—simply install and rely on steady performance.
- Versatile applications: Besides generator starting, these batteries serve well in UPS systems, emergency power applications, portable tools, and other 12V uses where a dependable, long-lasting battery is important.
- Cost-effective solution: The included pair offers immediate replacement plus a spare, minimizing downtime during critical operations.
Don’t let a weak battery leave you without power when you need it. Choose this high-performance battery 2-pack as the reliable replacement battery for your Firman 4550 Watt Portable Generator and enjoy the peace of mind that comes with durable, long-lasting performance. Purchase now to restore dependable starting power.
Technical Specifications
Product Highlights
- Brand Replacement : Replacement For Firman 4550 Watt Portable Generator - 2 Pack
- Manufacturer: SigmasTek
- Product Type: Home Power Backup
- Warranty: 12 Months
- Bulk Orders: sales@batteryweb.com
Payment & Security
Payment methods
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.




