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SigmasTek  |  SKU: BW-0348

APC SU3000RMNET High Performance Replacement Battery By SigmasTek

Sale price $155.20 USD Regular price $232.79
Shipping calculated at checkout.

➤ High-performance 12 Volt, 18 Amp Hour replacement for APC SU3000RMNET

➤ Easy to install with nut & bolt terminals

➤ Provides consistent and durable UPS support

➤ Protects valuable equipment from power loss


📦🚀 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 | 18 Ah

Terminal Type

Nut & Bolt

SigmasTek 12V 18Ah Replacement Battery — Compatible with APC SU3000RMNET

Protect your APC SU3000RMNET with the SigmasTek 12V 18Ah replacement UPS battery. Tailored to deliver reliable backup power and robust performance, this battery is ideal for users who require extended runtime and dependable operation from their UPS. If you need a high-capacity, high-performance UPS replacement battery for enterprise or small data center equipment, the SigmasTek 12V 18Ah unit offers the capacity and build quality to keep your APC SU3000RMNET functioning smoothly.

Key Specifications

  • Brand: SigmasTek
  • Voltage: 12 volts (12V)
  • Capacity: 18 amp hours (18Ah)
  • Terminal Type: Nut & Bolt
  • Compatible Model: APC SU3000RMNET
  • Designed for easy installation and high performance

Benefits

The SigmasTek 12V 18Ah is a long-lasting battery built for demanding UPS environments. With a higher amp-hour rating, this replacement UPS battery provides extended backup runtime for server racks, network infrastructure, and mission-critical systems. As a high-performance UPS battery, it supports steady power delivery under load and is well suited to handle frequent discharge and recharge cycles. The nut & bolt terminal style ensures secure connections and reliable conductivity in rack-mounted and cabinet installations.

Durability is a key advantage of the SigmasTek offering — it’s constructed to withstand the repeated deep cycles and constant readiness required by UPS systems. This makes it an excellent choice for emergency power backup, protecting sensitive electronics during outages, and maintaining graceful shutdown windows for servers and storage. Typical applications include enterprise UPS units like the APC SU3000RMNET, telecommunications cabinets, and critical infrastructure installations where maintaining uptime is essential.

Choosing a replacement UPS battery such as the SigmasTek 12V 18Ah helps reduce the risk of unexpected failures and supports predictable maintenance planning. Its higher capacity means fewer replacements over time when compared to lower-Ah alternatives, delivering better value for longer-term deployments. Whether used as a direct swap or stocked as part of preventive maintenance, this battery contributes to a reliable power strategy.

Ready to enhance your APC SU3000RMNET with a dependable, long-lasting battery? Purchase the SigmasTek 12V 18Ah high-performance UPS battery today and secure extended backup power for your critical systems.


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