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SigmasTek  |  SKU: BW-16389

Alexander B825 High Capacity Replacement Battery

Sale price $19.53 USD Regular price $22.43
Shipping calculated at checkout.

➤ Absorbent Glass Mat (AGM) technology for enhanced performance

➤ Maintenance-free and spill-proof design for hassle-free use

➤ U.L. recognized and CE certified for safety and reliability

➤ Brand new and factory fresh for maximum lifespan

➤ 1 year warranty ensures peace of mind and quality assurance


📦🚀 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 | 2.3 Ah

Terminal Type

F1

Alexander B825 Battery (Replacement) — Compatible with Alexander B825

Replace your worn or failing battery with the Alexander B825 replacement battery engineered for the Alexander B825 model. This rechargeable Sealed Lead Acid (SLA) unit is crafted to meet or exceed OEM specifications, offering consistent output, dependable safety certifications, and the performance needed for critical applications. Choose this replacement battery when reliability and compatibility are priorities.

Key Specifications

  • Model: Alexander B825 (Replacement)
  • Brand: SigmasTek
  • Battery Chemistry: Sealed Lead Acid (SLA), Absorbent Glass Mat (AGM) Technology
  • Voltage: 12 Volts
  • Capacity: 2.3 Ah
  • Terminal Type: F1
  • Design: Maintenance-Free with Spill Proof Construction
  • Certifications: U.L. Recognized and CE Certified
  • Condition: Brand New, Factory Fresh
  • Warranty: 1 Year Warranty

Benefits

The Alexander B825 replacement battery leverages AGM technology to deliver stable power, low self-discharge, and reliable performance under fluctuating loads. As a high-performance battery, it is designed to provide consistent voltage for sensitive electronics and systems where performance matters. Its maintenance-free design eliminates the need for water refills or frequent inspections, and the spill-proof construction adds safety during handling and installation.

Built for longevity, this long-lasting battery is tested to meet recognized safety standards (U.L. and CE), and comes factory fresh with a 1 year warranty to protect your investment. It is ideal for common SLA applications including UPS units, emergency power backups, alarm panels, and small power tools or diagnostic equipment that require a compact 12V 2.3Ah battery with an F1 terminal.

Installation is straightforward thanks to the F1 terminal layout and standard form factor. Whether refreshing the power in a critical backup system or maintaining spare inventory for rapid replacement, this Alexander B825 replacement battery offers dependable operation and peace of mind.

Don’t let undervoltage or old cells risk your equipment. Click to purchase this Alexander B825 replacement battery now and secure a long-lasting, high-performance battery backed by certifications and a 1 year warranty.


Payment & Security

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