For support or quotes: sales@batteryweb.com

🎉 First Order : Get 10% OFF! 🎉

WELCOME10
SigmasTek  |  SKU: BW-12676

JohnLite JML-2940 Compatible Replacement Battery

Sale price $14.91 USD Regular price $20.14
Shipping calculated at checkout.

➤ Compatible replacement for JohnLite JML-2940 emergency lighting battery

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

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

➤ U.L. Recognized and CE Certified for reliable safety standards

➤ Comes with a 1-year warranty and guaranteed factory-fresh quality


📦🚀 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.

📸 Send Your Battery Photo / Unsure? Expert Help

Snap a photo or video of your battery and send it to us. We'll identify the exact replacement—fast and hassle-free. Our team has helped thousands of customers find the right battery quickly and easily.
POST YOUR IMAGE

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 JML-2940 Replacement Battery — Compatible with JohnLite JML-2940

The JohnLite JML-2940 replacement battery is crafted to ensure consistent compatibility, dependable runtime, and professional-level reliability for your emergency lighting and related systems. Designed to meet or exceed OEM SLA battery specifications, this high-performance battery is also a dependable long-lasting battery option for critical backup applications where uptime matters.

Key Specifications

  • Model Compatibility: JohnLite JML-2940
  • Technology: Absorbent Glass Mat (AGM) Technology
  • Design: Maintenance-Free Design
  • Construction: 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: 7.5 Ah
  • Terminal Type: F1
  • Specification Note: Meets or exceeds OEM SLA battery specifications

Benefits

  • Durability: The AGM construction and spill-proof design protect the cell assembly from common environmental stresses, improving longevity in both fixed and portable installations.
  • Long Life: Maintenance-free operation reduces upkeep and helps preserve capacity over time, making this replacement battery a strong long-lasting battery selection for emergency readiness.
  • High Performance: Consistent voltage output and reliable recharge behavior ensure your systems—especially emergency lighting and alarms—operate at peak performance when needed.
  • Certified Safety: U.L. and CE certifications confirm adherence to safety standards required for commercial and residential emergency equipment.
  • Typical Uses: Ideal for emergency lighting, fire and security alarms, medical devices, and consumer electronics. It also functions well in UPS systems, emergency power backup, and compatible power tools requiring a 12V 7.5Ah SLA pack.
  • Hassle-Free Replacement: Engineered as a direct replacement for the JohnLite JML-2940, installation is straightforward, allowing quick restoration of service with minimal downtime.

Restore dependable backup power with this JohnLite JML-2940 replacement battery. If you need a high-performance battery that’s factory fresh and backed by a 1 year warranty, this is the replacement battery you can rely on. Purchase now to secure long-lasting protection for your critical systems.



Payment & Security

Payment methods

  • American Express
  • Apple Pay
  • Diners Club
  • Discover
  • Google Pay
  • Mastercard
  • PayPal
  • Shop Pay
  • Visa

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.