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SigmasTek  |  SKU: BW-4280

APC BACKUPS BK350E1 UPS High Performance Compatible Replacement Battery

Sale price $16.99 USD Regular price $24.15
Shipping calculated at checkout.

➤ Absorbent Glass Mat (AGM) technology for leak-proof performance

➤ High rate discharge design ensures reliable power delivery

➤ Maintenance-free with spill-proof construction for safety

➤ U.L. recognized and CE certified for quality assurance

➤ Compatible replacement with 1-year warranty for peace of mind


📦🚀 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 | 7.5 Ah

Terminal Type

F2

Replacement APC BACKUPS BK350E1 Battery — Compatible with APC BACKUPS BK350E1

Replace your aging battery with this reliable replacement APC BACKUPS BK350E1 battery, designed to meet or exceed OEM SLA specifications for APC BACKUPS BK350E1 UPS systems. Offering dependable performance, safety certifications, and maintenance-free operation, this replacement UPS battery is an excellent choice to restore full backup capability and protect your equipment from unexpected power interruptions.

Key Specifications

  • Absorbent Glass Mat (AGM) Technology
  • High Rate Discharge Design
  • Maintenance-Free Design with Spill Proof Construction
  • U.L. Recognized and CE Certified
  • Brand New, Factory Fresh
  • 1 Year Warranty
  • SigmasTek
  • 12 Volts
  • 7.5 Ah
  • F2 terminal
  • Compatible with APC BACKUPS
  • SLA replacement battery for APC BK350E1

Benefits

This long-lasting battery is engineered with AGM technology for reliable, spill-proof performance and low maintenance. The high rate discharge design allows the APC BACKUPS BK350E1 to handle sudden demands and short bursts of high current, ensuring connected equipment remains powered during critical moments. As a high-performance UPS battery, it provides dependable runtime and stable output for electronics, routers, and small servers.

Certified by U.L. and CE and delivered brand new with a 1 Year Warranty, this SigmasTek battery provides quality and assurance for installations in home offices, retail environments, and light industrial settings. Its maintenance-free construction reduces upkeep, making it ideal for both in-field replacement and scheduled maintenance programs. Typical applications include UPS backup, emergency power systems, and battery-powered tools where safe, short-term discharge is required.

Choosing the correct replacement UPS battery for your APC BACKUPS BK350E1 ensures longer service life, safer operation, and predictable performance when outages occur. This battery’s combination of certifications, warranty, and AGM construction makes it a strong choice for anyone needing reliable backup power quickly.

Ready to protect your systems? Buy this replacement UPS battery for the APC BACKUPS BK350E1 now and secure a high-performance UPS battery that delivers the long-lasting battery reliability you expect. Click to add to cart and maintain uninterrupted power.


Payment & Security

Payment methods

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