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SigmasTek  |  SKU: BW-13591

BS Battery B12-2.9 High Performance Replacement Battery

Sale price $18.99 USD Regular price $29.37
Shipping calculated at checkout.

➤ Compatible replacement for BS Battery B12-2.9 model

➤ Meets or exceeds OEM SLA battery specifications

➤ Brand new, factory fresh, and high-quality sealed lead acid battery

➤ Includes minimum one-year warranty for peace of mind

➤ UL listed for safety and reliability


📦🚀 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 | 2.9 AH

Terminal Type

F1

BS Battery B12-2.9 Replacement Battery — Compatible with BS Battery B12-2.9 (F1 Terminal)

Reliable performance and compact power meet compatibility in this replacement battery for the BS Battery B12-2.9. Engineered to meet or exceed OEM SLA specifications, this brand-new sealed lead acid battery provides consistent output and dependable service for a variety of small-form-factor and standby applications. If you require a compact, long-lasting battery that fits BS Battery B12-2.9 installations, this high-performance battery is designed to deliver.

Key Specifications

  • Compatible Model: BS Battery B12-2.9
  • Voltage: 12 Volts
  • Capacity: 2.9 Ah (2.9 amp-hours)
  • Terminal Type: F1
  • Brand / Supplier: SigmasTek (replacement for BS Battery)
  • Condition: Brand new, factory fresh
  • Standards: UL listed
  • Warranty: Minimum one year warranty
  • Compatibility Guarantee: 100% compatibility with BS Battery B12-2.9
  • Shipping: In stock, ships within 24 hours

Benefits

This compact replacement battery offers durable, maintenance-free operation ideal for smaller UPS units, emergency lighting fixtures, alarm systems, and portable equipment. As a sealed lead acid battery, it is non-spillable and safe to mount in a range of orientations, making installation straightforward in confined enclosures. The F1 terminal ensures a secure connection common to many compact battery compartments.

Beyond convenience, the unit is built for longevity as a long-lasting battery option for standby scenarios. It performs reliably under float conditions and provides predictable discharge behavior during power interruptions. This high-performance battery is suitable for emergency power, alarm backups, and small-scale UPS systems that require dependable short-duration backup capacity. The UL listing and included warranty add assurance that you’re installing a tested, quality replacement.

Technicians and end users will appreciate the quick availability—this replacement battery ships within 24 hours and is kept in stock—helping minimize downtime. The factory-fresh condition and compatibility guarantee with the BS Battery B12-2.9 make it a straightforward swap that restores dependable power to your equipment.

Need reliable compact power? Order this BS Battery B12-2.9 replacement battery today to restore dependable backup performance to your systems.


Payment & Security

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