For questions, quotes, or help finding the right battery, feel free to email us at sales@batteryweb.com

New collections added! Learn more

🎉 First Order Special 🎉

First-time shoppers get 5% OFF on batteries & accessories!

WELCOME5
SigmasTek  |  SKU: BW-3715

Alpha Technologies ALI Plus 800 High Performance UPS Replacement Battery Set

Sale price $33.31 USD Regular price $48.30
Shipping calculated at checkout.

➤ Two brand new 12V 7.5 AH SigmasTek replacement batteries included

➤ Designed for high rate discharge UPS and emergency power use

➤ Valve regulated, spill-proof, and maintenance free

➤ Certified for safety and performance with U.L. and CE marks

➤ Comes with a 1-year warranty for reliable service


📦🚀 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.
POST YOUR IMAGE

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 | 7.5 Ah

Terminal Type

F2

Replacement Battery Set for Alpha Technologies ALI Plus 800 UPS

Upgrade the backup power in your Alpha Technologies ALI Plus 800 with this reliable replacement battery set. Each package includes two SigmasTek SP12-7.5HR batteries (12 Volts, 7.5 AH) crafted for high rate discharge performance and dependable cycle life. If you’re looking for a long-lasting battery solution that restores runtime and safeguards critical systems, this replacement UPS battery set is engineered to meet those needs.

Key Specifications

  • Compatible UPS Model: Alpha Technologies ALI Plus 800
  • Battery Model: SigmasTek SP12-7.5HR
  • Quantity: 2 batteries per set
  • Voltage: 12 Volts
  • Capacity: 7.5 AH
  • Terminal Type: F2
  • Design: High Rate Discharge Design
  • Construction: Valve Regulated Spill Proof Construction
  • Features: Low Self-discharge
  • Durability: High Vibration Resistance
  • Certifications: U.L. Recognized and CE Certified
  • Condition: Brand New, Factory Fresh
  • Warranty: 1 Year Warranty

Benefits

These batteries offer robust durability and dependable performance for UPS installations. The high rate discharge design ensures sufficient peak current delivery for brief, demanding loads, while the valve-regulated, spill-proof build reduces maintenance requirements and improves safety. Low self-discharge helps retain stored energy during periods of inactivity, delivering readiness when power interruptions occur. As a high-performance UPS battery option, this set provides consistent output and long-term value.

Ideal for use in the ALI Plus 800, these batteries are also suited for emergency power systems and battery-powered tools that require short-duration power bursts. The components are U.L. recognized and CE certified, and each battery set is factory fresh and tested to meet or exceed OEM performance standards. Backed by a 1 year warranty, this replacement pack brings confidence to your backup power strategy.

Note: installation requires reuse of existing cables and hardware from your original ALI Plus 800 setup. For assistance, contact our customer service team at . Most in-stock orders ship within 24 hours to minimize downtime.

Don’t let depleted batteries compromise your backup system — buy this long-lasting, high-performance replacement UPS battery set for the Alpha Technologies ALI Plus 800 today and keep your critical systems protected.


Payment & Security

Payment methods

  • American Express
  • Apple Pay
  • 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.