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SigmasTek  |  SKU: BW-17088

FIAMM FG20121A Compatible Replacement Battery

Sale price $15.11 USD Regular price $17.36
Shipping calculated at checkout.

➤ Compatible replacement for FIAMM FG20121A model

➤ Absorbent Glass Mat (AGM) technology for enhanced performance

➤ Maintenance-free and spill-proof design for safety

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

➤ Brand new with 1-year warranty included


📦🚀 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 | 1.2 Ah

Terminal Type

F1

FIAMM FG20121A Replacement Battery — Compatible with FIAMM FG20121A

Upgrade your power reliability with this replacement battery compatible with the FIAMM FG20121A. Designed to meet or exceed OEM SLA specifications, this high-performance battery delivers dependable power, consistent performance, and peace of mind for critical systems. Whether you need a long-lasting battery for backup power, alarm systems, or portable devices, the FIAMM FG20121A replacement offers maintenance-free operation and proven safety certifications for reliable everyday use.

Key Specifications

  • Compatible Model: FIAMM FG20121A
  • Technology: Absorbent Glass Mat (AGM) Technology
  • Design: Maintenance-Free Design with Spill Proof Construction
  • Certifications: U.L. Recognized and CE Certified
  • Condition: Brand New, Factory Fresh
  • Warranty: 1 Year Warranty
  • Brand: SigmasTek
  • Voltage: 12 Volts
  • Capacity: 1.2 Ah
  • Terminal Type: F1

Benefits

This replacement battery combines durable AGM construction with a maintenance-free, spill-proof design to deliver reliable, long-life performance. AGM technology helps resist vibration and improves charge acceptance, making this a high-performance battery ideal for repeated charge/discharge cycles. The included U.L. recognition and CE certification ensure that safety and quality standards are met, so you can trust the battery in sensitive installations.

Durability and consistent output make this a long-lasting battery choice for applications such as UPS systems, emergency lighting, alarm systems, telecommunications, and portable power tools. Its compact 12V 1.2Ah form factor with F1 terminals fits many common housings and connectors for easy replacement. As a replacement battery specifically listed for the FIAMM FG20121A, it guarantees compatibility and reliable operation without guesswork.

Because it is factory fresh and backed by a 1 Year Warranty, you gain additional assurance against manufacturing defects. The maintenance-free design removes the need for periodic electrolyte checks or topping up, reducing downtime and ongoing maintenance costs. Overall, this unit offers a practical combination of safety certifications, AGM reliability, and the rugged construction expected from a high-quality SLA replacement.

Ready to replace your old cell? Purchase this FIAMM FG20121A replacement battery now to restore dependable power and extend the life of your equipment with a trusted, high-performance battery option.


Payment & Security

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