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SigmasTek  |  SKU: BW-4817

Best Power LI 3.0KVA UPS High Performance Replacement Battery Set

Sale price $248.46 USD Regular price $313.80
Shipping calculated at checkout.

➤ Replacement battery set with 3 SigmasTek SP12-35 NB batteries (12V, 35 AH) for Best Power LI 3.0KVA UPS

➤ High rate discharge design for quick high power output

➤ Valve regulated, spill-proof for leak-proof, maintenance-free operation

➤ Low self-discharge supports longer battery life

➤ U.L. recognized, CE certified, and includes 1-year warranty


📦🚀 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 | 35 AH

Terminal Type

Nut & Bolt

Replacement Battery Set for Best Power LI 3.0KVA UPS

Specifically matched to the Best Power LI 3.0KVA Uninterruptible Power Supply, this replacement battery set delivers dependable compatibility, robust performance, and proven reliability. The package contains three SigmasTek SP12-35 NB batteries (12 Volts, 35 AH) optimized for high rate discharge use. If you need a replacement UPS battery that provides consistent backup power for servers, networking equipment, or emergency systems, this set offers a cost-effective and long-lasting solution.

Key Specifications

  • Compatible UPS Model: Best Power LI 3.0KVA
  • Battery Model: SigmasTek SP12-35 NB
  • Quantity Included: 3 batteries
  • Voltage: 12 Volts
  • Capacity: 35 AH (Amp-hours)
  • Terminal Type: Nut & Bolt
  • Design: High Rate Discharge Design
  • Construction: Valve Regulated Spill Proof
  • Features: Low Self-discharge, High Vibration Resistance
  • Certifications: U.L. Recognized and CE Certified
  • Condition: Brand New, Factory Fresh
  • Warranty: 1 Year Warranty

Benefits

  • Durability: Built with valve-regulated, spill-proof housing and engineered to resist vibration for reliable operation in rack or floor-mounted UPS enclosures.
  • Long life: Low self-discharge properties and factory-fresh condition help maximize usable life and reduce the frequency of replacements, delivering a dependable, long-lasting battery.
  • High performance: Tailored for high rate discharge scenarios, this kit supplies the instantaneous current needed during short-term high loads, ensuring the Best Power LI 3.0KVA maintains critical uptime.
  • Typical applications: Ideal as a replacement UPS battery for the Best Power LI 3.0KVA, as well as emergency power supply systems and certain battery-powered tools where 12V 35AH modules are required.
  • Safety & compliance: U.L. recognition and CE certification indicate adherence to industry safety standards for backup power equipment.
  • Warranty & testing: Every battery is tested to meet or exceed OEM specifications and includes a 1 year warranty for confidence in performance.

Installation requires reusing the existing cables and hardware from your original configuration. Orders for in-stock replacement UPS battery kits typically ship within 24 hours. If you have any questions about compatibility or installation, our customer service team is ready to help at .

Protect your equipment with this high-performance UPS battery replacement for the Best Power LI 3.0KVA today — order now to ensure continuous, reliable backup power and a long-lasting battery solution.



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