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SigmasTek  |  SKU: BW-2877

OPTI-UPS DS20KB31 UPS Compatible Replacement Battery Set

Sale price $659.99 USD Regular price $965.70
Shipping calculated at checkout.

➤ Includes 40 SigmasTek SP12-7.5HR batteries (12V, 7.5 AH)

➤ High power output for OPTI-UPS DS20KB31 UPS units

➤ Valve regulated spill-proof construction for safety

➤ Low self-discharge for longer battery readiness

➤ 1 year warranty included


📦🚀 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

Replacement Battery Set for OPTI-UPS DS20KB31 UPS

Keep your OPTI-UPS DS20KB31 operating at peak reliability with this complete replacement UPS battery set. The package contains 40 SigmasTek SP12-7.5HR batteries (12 Volts, 7.5 AH) designed for high-rate discharge performance and dependable emergency support. Engineered for robust UPS operation, this high-performance UPS battery kit delivers the consistent power and safety features required for mission-critical equipment and uninterrupted power supply systems.

Key Specifications

  • Battery brand: SigmasTek
  • Battery model: SP12-7.5HR
  • Voltage: 12 Volts
  • Capacity: 7.5 AH
  • Quantity included: 40 batteries
  • Terminal type: F2
  • Design: High Rate Discharge Design
  • Construction: Valve Regulated Spill Proof Construction
  • Self-discharge: Low Self-discharge
  • Vibration resistance: High Vibration Resistance
  • Certifications: U.L. Recognized and CE Certified
  • Condition: Brand New, Factory Fresh
  • Warranty: 1 Year Warranty
  • Installation note: Use all existing cables and hardware from original configuration to connect the new UPS batteries

Benefits

This replacement set is a dependable, long-lasting battery option for the OPTI-UPS DS20KB31, offering enhanced runtime and consistent discharge behavior under heavy loads. The high rate discharge design supports higher power demand over short intervals, making it well-suited for UPS units that handle sudden load changes or require emergency backup during power events. As a high-performance UPS battery solution, these cells provide rapid response and stable output to protect sensitive electronics.

Safety and longevity are priorities: valve regulated, spill-proof construction reduces maintenance and risk, while low self-discharge ensures batteries remain ready for service even after storage. High vibration resistance and certifications like U.L. and CE demonstrate rigorous quality control. Typical applications include UPS units, emergency power supply systems, and battery-powered tools where dependable power and quick recovery are essential.

Our trained technicians test every set to meet or exceed OEM requirements. If you need help confirming compatibility with your OPTI-UPS DS20KB31 or assistance with installation guidance, call customer service at . In-stock orders usually ship within 24 hours to minimize downtime and get your systems back to reliable operation.

Ready to replace your batteries? Purchase this long-lasting, high-performance UPS battery set for the OPTI-UPS DS20KB31 now and restore confidence in your backup power.


Payment & Security

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