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SigmasTek  |  SKU: BW-5978

ADT Security 804208 High Performance Alarm Replacement Battery

Sale price $18.66 USD Regular price $22.53
Shipping calculated at checkout.

➤ Compatible replacement for ADT Security 804208 alarm battery

➤ Uses Absorbent Glass Mat (AGM) technology for reliable performance

➤ Maintenance-free and spill-proof design for safety and convenience

➤ U.L. Recognized and CE Certified for quality assurance

➤ Includes 1-year warranty and factory-fresh condition


📦🚀 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

6 Volts | 12 Ah

Terminal Type

F1

Replacement ADT Security 804208 Battery — Compatible with ADT Security 804208

Keep your ADT security equipment operating at peak reliability with a replacement battery specifically made for the ADT Security 804208 model. This high-performance, factory-fresh SLA battery meets or exceeds OEM specifications and delivers the dependable standby power required by alarm and security systems. Trust the compatibility and safety certifications to provide consistent, long-lasting service.

Key Specifications

  • Model Compatibility: ADT Security 804208
  • Battery Type: Absorbent Glass Mat (AGM) Technology
  • Voltage: 6 Volts
  • Capacity: 12 Ah
  • Terminal: F1
  • Brand: SigmasTek
  • Design: Maintenance-Free with Spill Proof Construction
  • Certifications: U.L. Recognized and CE Certified
  • Condition: Brand New, Factory Fresh
  • Warranty: 1 Year Warranty
  • Compatible Applications: Access Control Systems; Home Alarm Systems; Burglar Alarm Systems; Security Systems; Power Supplies

Benefits

This replacement battery is built to perform in demanding security environments. The AGM construction ensures a sealed, maintenance-free design that prevents spills and reduces service needs. As a high-performance battery, it supports steady current delivery and quick recovery between discharge events—exactly what alarm panels, access control systems, and monitoring devices require.

Installers and facility managers choose this long-lasting battery because it combines certified safety, consistent runtime, and compact form factor suited to ADT panels. With U.L. recognition and CE certification, the ADT Security 804208 replacement provides confidence in both safety and performance. Use it to maintain backup power for security systems, power supplies, UPS units, and emergency systems.

  • Durability: Robust sealed design withstands vibration and minimizes maintenance.
  • Long Life: Reliable across many charge/discharge cycles for sustained standby use.
  • High Performance: Stable output under load for uninterrupted alarm and control operation.
  • Typical Applications: Access control, home and commercial alarm systems, burglar alarms, security systems, UPS and power supply backup.

Don’t risk downtime—replace your ADT Security 804208 battery now. Add this dependable, long-lasting replacement battery to your cart and protect your security systems with a product backed by a 1 year warranty.


Payment & Security

Payment methods

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