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SigmasTek  |  SKU: BW-12696

JohnLite 2951 Compatible Replacement Battery

Sale price $22.21 USD Regular price $25.82
Shipping calculated at checkout.

➤ Meets or exceeds OEM SLA battery specifications for reliable performance

➤ Absorbent Glass Mat (AGM) technology ensures enhanced durability and safety

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

➤ U.L. Recognized and CE Certified for guaranteed quality and compliance

➤ Includes a 1-year warranty for peace of mind and trustworthiness


📦🚀 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 | 7.5 Ah

Terminal Type

F1

JohnLite 2951 Replacement Battery - Compatible with JohnLite 2951

When your JohnLite 2951 needs a dependable power source, choose a purpose-built replacement battery that ensures peak performance and full compatibility. This JohnLite 2951 replacement battery offers a blend of reliability, safety, and performance — ideal for emergency lighting and other critical systems where continuous power is essential. Designed to match OEM SLA specifications, it is a trustworthy option for professional and home use.

Key Specifications

  • Model: JohnLite 2951 (Replacement)
  • Brand: SigmasTek
  • Voltage: 12 Volts
  • Capacity: 7.5 Ah
  • Terminal Type: F1
  • Battery Type: SLA (Sealed Lead Acid) with AGM Technology
  • Design: Maintenance-Free, Spill Proof Construction
  • Certifications: U.L. Recognized and CE Certified
  • Condition: Brand New, Factory Fresh
  • Warranty: 1 Year

Benefits

As a high-performance battery replacement, the JohnLite 2951 is built for long life and dependable operation. AGM technology provides enhanced charge acceptance, low self-discharge, and robust performance in cycling or standby applications. The maintenance-free design means less upkeep and reduced downtime for technicians, while the spill-proof construction protects equipment and personnel during installation and service.

This long-lasting battery is U.L. Recognized and CE Certified, providing assurance for use in regulated environments and safety-critical systems. It is an excellent choice for emergency lighting fixtures, security and fire alarm panels, and medical equipment that cannot afford power interruptions.

Typical uses include emergency lighting, security alarms, fire alarms, home & garden electronics, and consumer devices. Beyond these, the JohnLite 2951 is well-suited for UPS backup, emergency power systems, and compact portable tools requiring a stable 12 Volt, 7.5 Ah source. Whether you’re performing scheduled maintenance or responding to a failure, this replacement battery delivers OEM-level compatibility at a cost-effective price.

Ensure uninterrupted operation of your critical systems—buy the JohnLite 2951 replacement battery today. Click to purchase and take advantage of guaranteed compatibility and a 1 year warranty.


Payment & Security

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