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SigmasTek  |  SKU: BW-5121

APC SMART-UPS RM SU3000RM UPS High Performance Replacement Battery Set

Sale price $155.20 USD Regular price $225.03
Shipping calculated at checkout.

➤ Includes 4 brand new SigmasTek SP12-18HR batteries (12V, 18AH)

➤ High rate discharge design for reliable short-term power bursts

➤ Valve regulated, spill-proof construction for safe, maintenance-free use

➤ Low self-discharge extends shelf life and readiness

➤ U.L. Recognized and CE Certified for quality and safety compliance


📦🚀 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

Replacement SigmasTek SP12-18HR Battery Set for APC SMART-UPS RM SU3000RM

This premium replacement UPS battery set is designed specifically for the APC SMART-UPS RM SU3000RM, delivering dependable compatibility, improved performance, and field-proven reliability. The kit includes four brand new SigmasTek SP12-18HR batteries (12 Volts, 18 AH) configured to restore runtime and surge capability for your SU3000RM UPS. Ideal for data center racks, network closets, and critical power applications, this replacement UPS battery set is built for the higher power demands of modern equipment while maintaining safe, spill-proof operation. Please note: you will need to use all existing cables and hardware from your original configuration to connect these new UPS batteries.

Key Specifications

  • Battery Model: SigmasTek SP12-18HR
  • Quantity: 4 batteries per set
  • Voltage: 12 Volts
  • Capacity: 18 AH (Amp-hours)
  • Design: High Rate Discharge Design
  • Construction: Valve Regulated Spill Proof Construction
  • Features: Low Self-discharge
  • Durability: High Vibration Resistance
  • Certifications: U.L. Recognized and CE Certified
  • Condition: Brand New, Factory Fresh
  • Warranty: 1 Year Warranty
  • Terminal Type: Nut & Bolt
  • Compatible With: APC SMART-UPS RM SU3000RM

Benefits

When you replace aging or failed cells with this high-performance UPS battery set, you restore reliable backup power to critical systems. These SigmasTek batteries are engineered for high rate discharge — a necessity in UPS applications that demand short bursts of high current. That makes this product a high-performance UPS battery solution for environments where rapid load support and clean switchover matter.

The valve regulated spill proof construction plus low self-discharge chemistry extend service life and simplify maintenance, while high vibration resistance increases durability in rack-mounted or mobile installations. These design choices result in a long-lasting battery investment that reduces downtime and maintenance intervals. With U.L. recognition and CE certification, the set meets important safety and regulatory benchmarks for commercial installations.

Typical applications include Uninterruptible Power Supply (UPS) units like the APC SMART-UPS RM SU3000RM, emergency power supply systems for servers and telecom equipment, and battery-powered tools or support equipment that require short-duration high current. Whether you manage a server room, a UPS maintenance program, or an emergency backup system, this replacement UPS battery set is optimized for dependable performance.

Restore runtime and confidence today — buy this SigmasTek replacement UPS battery set for the APC SMART-UPS RM SU3000RM now and get a long-lasting battery solution backed by testing and a 1 year warranty. Orders for in-stock items typically ship within 24 hours.


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