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SigmasTek  |  SKU: BW-4920

CyberPower CP425G Compatible SLA High Performance Replacement Battery

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

➤ Replacement battery for CyberPower CP425G UPS unit

➤ High rate discharge for reliable emergency power

➤ Valve regulated, spill-proof construction

➤ Low self-discharge and vibration resistant

➤ U.L. Recognized, CE Certified with 1 year warranty


📦🚀 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 Battery — Compatible with CyberPower CP425G UPS

Maintain critical protection for your CyberPower CP425G with this SigmasTek SP12-3.5HR replacement UPS battery. Specifically built for reliable short-duration power delivery, this brand new unit restores runtime and ensures your CP425G continues to protect sensitive electronics. Follow the original installation practice by reusing all existing cables and hardware to connect this replacement UPS battery for safe, simple swap-out.

Key Specifications

  • Brand: SigmasTek
  • Model: SP12-3.5HR
  • Voltage: 12 Volts
  • Capacity: 3.5 AH
  • High Rate Discharge Design
  • Valve Regulated Spill Proof Construction
  • Low Self-discharge
  • High Vibration Resistance
  • U.L. Recognized
  • CE Certified
  • Condition: Brand New, Factory Fresh
  • Warranty: 1 Year Warranty
  • Designation: F2SLA

Benefits

Designed for durability, this replacement UPS battery offers a robust set of features: valve-regulated, spill-proof construction for safety and low upkeep; low self-discharge to preserve charge during standby; and high vibration resistance to extend service life under challenging conditions. Its high rate discharge design makes it a high-performance UPS battery, capable of delivering the power burst required by the CyberPower CP425G during critical events.

It’s an excellent long-lasting battery choice for Uninterruptible Power Supply (UPS) applications, emergency power backup, and portable battery-powered tools. UL recognition and CE certification provide added confidence in safety and compliance, while our in-house testing ensures each unit meets or exceeds OEM expectations. This combination results in a reliable replacement that keeps your CP425G ready for the next outage.

Order your SigmasTek SP12-3.5HR replacement UPS battery for the CyberPower CP425G now and benefit from fast shipping and a 1 year warranty. Click to buy and secure dependable backup power today.


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