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SigmasTek  |  SKU: BW-5441

APC Back-UPS Pro 650VA BK650IPNP UPS Compatible Replacement Battery

Sale price $51.94 USD Regular price $75.31
Shipping calculated at checkout.

➤ 12 Volts, 12 Ah capacity for reliable power backup

➤ Designed specifically for APC Back-UPS units

➤ Valve regulated, spill-proof construction for safety

➤ Low self-discharge ensures longer shelf life


📦🚀 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 | 12 Ah

Terminal Type

F2

SigmasTek12 12 Volts 12 Ah F2 - Compatible with APC Back-UPS

This SigmasTek12 replacement UPS battery is engineered for reliable compatibility with APC Back-UPS systems, delivering consistent performance and dependable backup power when you need it most. Built to be a straightforward swap-in for your UPS, this high-performance UPS battery is optimized to restore runtime, protect sensitive electronics, and keep critical systems online during outages. If you need a long-lasting battery replacement that restores the protection of your APC Back-UPS, this SigmasTek12 12V 12Ah unit is an excellent, cost-effective choice.

Key Specifications

  • Brand: SigmasTek12
  • Voltage: 12 Volts
  • Capacity: 12 Ah
  • Terminal Type: F2
  • Compatible UPS Model: APC Back-UPS

Benefits

Designed for durability and dependable cycle life, this replacement UPS battery provides robust performance for UPS applications, emergency power, and battery-powered tools. As a high-performance UPS battery option for APC Back-UPS units, it restores runtime to keep modems, routers, home-office equipment, and point-of-sale systems running through outages and brownouts. The F2 terminal configuration ensures secure, low-resistance connections in compatible trays and holders.

Users will appreciate improved reliability and predictable power delivery: the SigmasTek12 12V 12Ah offers steady discharge characteristics that support high-load events and short-term high-rate power draw often required by UPS units. This long-lasting battery solution is ideal for homeowners and small businesses seeking a cost-effective way to maintain continuous protection for critical electronics without replacing the entire UPS.

Typical applications include Uninterruptible Power Supply (UPS) units, emergency power backup for networking and telecom gear, and use in portable or stationary battery-powered tools that accept 12V 12Ah sealed lead-acid packs with F2 terminals. Installation is straightforward—verify fit and terminal orientation, then connect per your APC Back-UPS service instructions.

Ready to replace your aging UPS battery? Choose this SigmasTek12 replacement UPS battery for APC Back-UPS to restore protection and performance. Click to buy now and secure reliable backup power for your equipment.


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