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SigmasTek  |  SKU: BW-3319

OPTI-UPS DS8KB31 UPS Compatible Replacement Battery Set

Sale price $329.99 USD Regular price $482.85
Shipping calculated at checkout.

➤ Includes 20 SigmasTek SP12-7.5HR batteries (12V 7.5AH) for OPTI-UPS DS8KB31 UPS

➤ High rate discharge design supports high power demands over short periods

➤ Valve regulated and spill proof for safe, reliable operation

➤ Low self-discharge keeps batteries ready for emergency use

➤ Comes brand new with a 1 year warranty and OEM standard testing


📦🚀 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 | 7.5 Ah

Terminal Type

F2

SigmasTek SP12-7.5HR Replacement Battery Set for OPTI-UPS DS8KB31

When your OPTI-UPS DS8KB31 needs a reliable replacement, this 20-piece SigmasTek SP12-7.5HR battery set offers precise compatibility, dependable power, and consistent runtime. These 12 Volt, 7.5 AH sealed lead-acid batteries are engineered for high rate discharge performance, providing a dependable, factory-fresh replacement UPS battery option for service technicians, IT managers, and facilities personnel.

Key Specifications

  • Battery model: SigmasTek SP12-7.5HR
  • Quantity included: 20 batteries
  • Voltage: 12 Volts
  • Capacity: 7.5 AH (amp-hours)
  • Terminal type: F2
  • Design: High Rate Discharge Design
  • Construction: Valve Regulated Spill Proof Construction
  • Features: Low Self-discharge
  • Features: High Vibration Resistance
  • Certifications: U.L. Recognized and CE Certified
  • Condition: Brand New, Factory Fresh
  • Warranty: 1 Year Warranty
  • Compatibility note: Use existing cables and hardware from your original configuration to connect the new UPS batteries
  • Brand: SigmasTek

Benefits

  • Dependable durability: Valve-regulated, spill-proof construction combined with vibration-resistant design means these batteries withstand the stresses of real-world UPS environments.
  • Long-lasting battery solution: Low self-discharge reduces capacity loss in storage and extends operational life, making these an excellent long-term investment for backup power maintenance.
  • High-performance UPS battery: Specifically designed for high rate discharge events, the SigmasTek SP12-7.5HR delivers the quick current surges needed by UPS systems like the OPTI-UPS DS8KB31.
  • Critical power readiness: Ideal for uninterruptible power supply units, emergency power, and other applications that demand uninterrupted operation.
  • Versatility: Also appropriate for emergency power supply applications and battery-powered tools where 12V 7.5Ah performance is required.
  • Tested and certified: Each replacement UPS battery set is inspected and tested to meet or exceed OEM performance—U.L. and CE certifications add an extra layer of assurance.

Ready to replace the battery bank in your OPTI-UPS DS8KB31? Order this high-performance, long-lasting battery pack now. With 20 SigmasTek SP12-7.5HR batteries, a 1 year warranty, and quick shipping for in-stock items, you can restore dependable backup power with confidence—buy today.


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