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SigmasTek  |  SKU: BW-12704

JohnLite 2938 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 safety and durability

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

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

➤ Includes 1-year warranty and factory-fresh guarantee


📦🚀 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 2938 Replacement Battery (Compatible with JohnLite 2938)

Maintain uninterrupted protection with a replacement battery tailored for the JohnLite 2938 model. This replacement battery is engineered to meet or exceed OEM SLA standards and combines Absorbent Glass Mat (AGM) technology with a maintenance-free, spill-proof design to deliver reliable, long-lasting power when it matters most. Choose a dependable, high-performance battery to support emergency lighting, alarms, and other critical systems.

Key Specifications

  • Compatibility: JohnLite 2938
  • 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

Benefits

  • Built to last: The AGM and spill-proof design supports robust installation and transport conditions, helping the battery withstand typical stresses and remain operational over time.
  • Extended reliability: This long-lasting battery offers consistent charge acceptance and discharge stability, ideal for emergency lighting systems, security panels, and fire alarm backups.
  • Dependable performance: As a high-performance battery replacement, it sustains required voltage under load—critical for UPS systems, medical devices, and safety equipment.
  • Low upkeep: Maintenance-free construction reduces the need for routine care, saving labor and ensuring systems remain protected without frequent intervention.
  • Assured compliance: U.L. recognition and CE certification provide confidence that the battery meets established safety and performance standards.
  • Versatile deployment: Suitable for emergency lighting, security and fire alarms, consumer electronics, home & garden devices, and medical equipment. Also serves well as backup power for UPS units and emergency tools.
  • Ready for service: Ships brand new and factory fresh with a 1 year warranty, ensuring instant compatibility and protection for your JohnLite 2938 systems.

Ready to secure continuous, reliable power? Add this replacement battery for the JohnLite 2938 to your order now and protect your critical systems with a reliable, long-lasting, high-performance battery.


Payment & Security

Payment methods

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