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SigmasTek  |  SKU: BW-1613

Topaz 850 High Performance Compatible Replacement Battery Set

Sale price $183.99 USD Regular price $262.04
Shipping calculated at checkout.

➤ Comes with 2 replacement 12V 35AH UPS batteries with NB terminals

➤ AGM technology ensures maintenance-free, leak-proof operation

➤ UL certification guarantees safety and performance standards

➤ Fits and installs with original UPS cables and hardware

➤ 1-year warranty included for product assurance


📦🚀 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 SigmasTek 12V 35AH (x2) for Topaz 850 UPS

Engineered for the Topaz 850, this replacement UPS battery bundle provides dependable compatibility, consistent performance, and long-term reliability. The two 12V 35AH sealed batteries use advanced AGM technology to deliver efficient power storage with minimal maintenance. These UL-certified batteries are a direct replacement option that meets or exceeds OEM specifications, keeping your Topaz 850 UPS ready for power disruptions and critical backup scenarios.

Key Specifications

  • Compatible UPS model: Topaz 850
  • Package contains: 2 batteries (price includes both batteries)
  • Voltage: 12 V
  • Amp Hours: 35 AH
  • Chemistry: SLA (Sealed Lead Acid)
  • Battery Technology: AGM (Absorption Glass Mat) Sealed Battery Technology
  • Terminal: NB (Nut & Bolt)
  • Weight: 49.4 Lbs (per battery)
  • Dimensions: Length 7.72 In, Width 5.14 In, Height 6.14 In
  • Warranty: 1-year Warranty
  • Certification: UL (Underwriters Laboratories) certified
  • Brand/Supplier: SigmasTek (sourced by ReplaceUPSBattery.com)
  • Shipping: UPS Ground and USPS; we ship in 1 business day for all in-stock items
  • Guaranteed compatibility with original battery set

Benefits

This replacement UPS battery set is built to last, providing a long-lasting battery option for the Topaz 850. AGM technology enhances cycle life and reduces maintenance compared to flooded lead-acid batteries, making these units an excellent choice for regular use and emergency backup. As a high-performance UPS battery, they deliver consistent output under load and quick recovery, ensuring your UPS provides stable power to essential systems when the grid fails.

Ideal applications include UPS systems for IT equipment, emergency power for communications gear, and other standby power roles. The 35 AH capacity balances runtime with size, providing meaningful backup without requiring oversized bay space. The NB (nut & bolt) terminal style secures connections and simplifies installation when reusing the original cables and hardware in your Topaz 850 configuration.

These UL-certified batteries come with a one-year warranty and quick shipping options, helping you restore protection with minimal delay. Always verify existing battery dimensions before ordering, since manufacturers can update case sizes without notice.

Don’t wait until a failure—ensure your Topaz 850 is protected with this reliable, long-lasting replacement UPS battery set. Add to cart today or contact our support team at (800) 657-1303 for help selecting the right option.


Payment & Security

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