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SigmasTek  |  SKU: BW-4925

APC BACK-UPS ES BE350R UPS High Performance Replacement Battery

Sale price $19.19 USD Regular price $27.82
Shipping calculated at checkout.

➤ Replacement battery for APC BACK-UPS ES BE350R UPS unit

➤ High discharge rate for reliable short-term power output

➤ Valve regulated, spill-proof, and low self-discharge

➤ UL listed, CE certified, and brand new with 1-year warranty

➤ Guaranteed OEM compatibility and performance


📦🚀 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 | 3.5 Ah

Terminal Type

F2

SigmasTek SP12-3.5HR Replacement for APC BACK-UPS ES BE350R — Compatible with APC BACK-UPS ES BE350R

Ensure uninterrupted protection for your APC BACK-UPS ES BE350R with the SigmasTek SP12-3.5HR replacement UPS battery. This factory-fresh 12 Volt 3.5 Ah sealed lead acid battery is engineered for reliable performance, meeting the needs of UPS owners who want a dependable, high-performance UPS battery replacement. It’s an affordable way to restore emergency runtime and safeguard your equipment.

Key Specifications

  • Compatible UPS Model: APC BACK-UPS ES BE350R
  • Manufacturer / Brand: SigmasTek (SP12-3.5HR)
  • Voltage: 12 Volts
  • Capacity: 3.5 Ah
  • High Rate Discharge Design: Yes
  • Construction: Valve Regulated Spill Proof (sealed)
  • Low Self-discharge: Yes
  • High Vibration Resistance: Yes
  • Certifications: U.L. Recognized and CE Certified
  • Condition: Brand New, Factory Fresh
  • Warranty: 1 Year Warranty
  • Terminal Type: F2

Benefits

This high-performance UPS battery offers a blend of durability, safety, and dependable power delivery. The high rate discharge design supplies short-term high power when your UPS demands it most, while valve-regulated, spill-proof construction keeps maintenance to a minimum. Low self-discharge helps preserve charge during storage, making this a long-lasting battery that stays ready for emergency use. Typical applications include UPS units, emergency power supplies, and battery-powered tools—wherever dependable backup power is critical.

Certified by U.L. and CE standards and factory-tested to meet or exceed OEM specifications, the SigmasTek SP12-3.5HR replacement offers professional-grade performance at an excellent value. The unit is brand new and backed by a one-year warranty, ensuring confidence in both quality and compatibility with your APC BACK-UPS ES BE350R.

Need help with your purchase or installation? Contact our customer service at or email our support team for expert assistance. In-stock items typically ship within 24 hours to minimize downtime.

Ready to protect your equipment? Order your APC BACK-UPS ES BE350R replacement battery today and get a reliable, long-lasting battery solution with fast shipping and warranty coverage.


Payment & Security

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