For questions, quotes, or help finding the right battery, feel free to email us at sales@batteryweb.com

New collections added! Learn more

🎉 First Order Special 🎉

First-time shoppers get 5% OFF on batteries & accessories!

WELCOME5
SigmasTek  |  SKU: BW-2343

Computer Accessories CSR400 UPS High Performance Replacement Battery

Sale price $16.99 USD Regular price $24.05
Shipping calculated at checkout.

➤ OEM SLA battery specifications met or exceeded for Computer Accessories CSR400

➤ Advanced AGM technology for efficient, high rate discharge

➤ Maintenance-free and spill-proof for worry-free operation

➤ U.L. recognized and CE certified for trusted performance

➤ Backed by 1 year warranty and full compatibility guarantee


📦🚀 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.

📸 Send Your Battery Photo / Unsure? Expert Help

Snap a photo or video of your battery and send it to us. We'll identify the exact replacement—fast and hassle-free. Our team has helped thousands of customers find the right battery quickly and easily.
POST YOUR IMAGE

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

6 Volts | 12 Ah

Terminal Type

F2

SigmasTek 6V 12Ah F2 Replacement Battery for Computer Accessories CSR400

Keep your Computer Accessories CSR400 UPS performing at peak reliability with this SigmasTek 6V 12Ah F2 replacement UPS battery. Made to meet or exceed OEM SLA specifications, this battery provides consistent compatibility, dependable runtime, and rugged performance for protecting computers, network equipment, and sensitive electronics. Featuring Absorbent Glass Mat (AGM) technology and a maintenance-free, spill-proof design, this long-lasting battery is a practical upgrade for anyone seeking reliability and safety in a direct replacement pack.

Key Specifications

  • Compatible UPS Model: Computer Accessories CSR400
  • Battery Type: Sealed Lead Acid (SLA) / Absorbent Glass Mat (AGM)
  • Voltage: 6 Volts
  • Capacity: 12 Ah
  • Terminal Type: F2
  • Design: High Rate Discharge Design
  • Maintenance: Maintenance-Free with Spill Proof Construction
  • Certifications: U.L. Recognized and CE Certified
  • Condition: Brand New, Factory Fresh
  • Warranty: 1 Year Warranty
  • Brand: SigmasTek
  • Typical Applications: Emergency Power Supply; Battery Powered Tools

Benefits

This replacement UPS battery is engineered for durability and consistent performance under load. The AGM construction and high rate discharge capability allow the CSR400 to deliver dependable power in short-duration, high-demand events—making it an excellent choice for emergency power supply and mission-critical equipment. As a high-performance UPS battery, it offers dependable charge/discharge cycles and predictable end-of-life behavior so you can plan maintenance with confidence.

Maintenance-free and spill-proof, the SigmasTek unit reduces the need for routine attention and eliminates the hazards associated with traditional wet-cell batteries. U.L. and CE certifications demonstrate compliance with safety standards, while the brand new, factory-fresh condition and 1 year warranty provide immediate assurance of product quality. Whether used to back up servers, networking gear, medical monitors, or to support battery-powered tools, this long-lasting battery offers the dependable power you require.

Ready to replace your old battery? Order this SigmasTek replacement UPS battery for the Computer Accessories CSR400 now to restore reliable backup power and extend the life of your UPS system.


Payment & Security

Payment methods

  • American Express
  • Apple Pay
  • Diners Club
  • Discover
  • Google Pay
  • Mastercard
  • PayPal
  • Shop Pay
  • Visa

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.