Best Technologies BTG-0303 UPS High Performance Replacement Battery Set 21.02 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.
Best Technologies BTG-0303 UPS High Performance Replacement Battery Set 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
12 Volts | 7.5 Ah
Terminal Type
F2
Replacement Battery Set for Best Technologies BTG-0303 UPS - SigmasTek SP12-7.5HR (4-pack)
Specifically built to replace worn cells in the Best Technologies BTG-0303 Uninterruptible Power Supply (UPS), this replacement battery set delivers consistent reliability and tested performance. The package contains four SigmasTek SP12-7.5HR batteries (12 Volts, 7.5 AH) engineered for high rate discharge needs. If you are searching for a dependable replacement UPS battery to restore your BTG-0303, these factory fresh units offer proven durability and dependable runtime.
Key Specifications
- Battery model: SigmasTek SP12-7.5HR
- Quantity: 4 batteries per set
- Voltage: 12 Volts
- Capacity: 7.5 AH
- Design: High Rate Discharge Design
- Construction: Valve Regulated Spill Proof Construction
- Feature: Low Self-discharge
- Feature: High Vibration Resistance
- Certifications: U.L. Recognized and CE Certified
- Condition: Brand New, Factory Fresh
- Warranty: 1 Year Warranty
- Connection note: Use all existing cables and hardware from original configuration to connect new UPS batteries
- Brand: SigmasTek
- Compatible UPS model: Best Technologies BTG-0303
Benefits
- Safety and reliability: Valve-regulated, spill-proof design with U.L. and CE recognition ensures safe, dependable use in professional environments.
- Long-term readiness: Low self-discharge keeps these units ready in storage and reduces the risk of premature capacity loss — a practical long-lasting battery option for your BTG-0303.
- High-performance capability: Designed for high rate discharge, these batteries provide immediate power for transient high-load situations, making them a leading choice for a high-performance UPS battery replacement.
- Durable under stress: High vibration resistance supports use in locations where movement or equipment vibration is present.
- Versatile applications: Ideal for Uninterruptible Power Supply (UPS) units, emergency power systems, and battery powered tools requiring reliable short-term high output.
- Quality assurance: Each battery is factory fresh and tested to meet or exceed OEM specs, giving you a reliable and cost-effective replacement UPS battery solution.
Restore dependable backup power to your Best Technologies BTG-0303 today. Purchase this replacement UPS battery set now to benefit from quick shipping, expert support, and a 1 year warranty on a proven, long-lasting battery solution.
Technical Specifications
Product Highlights
- Brand Replacement : Best Technologies
- Manufacturer: SigmasTek
- Product Type: UPS Batteries
- 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.




