SANCA Sigma 4V 2.5Ah Sealed Lead Acid Battery – Rechargeable Power for Emergency Lights & UPS Systems India

Complete Product Overview – SANCA Sigma 4V 2.5Ah SLA Battery

The SANCA Sigma 4V 2.5Ah Sealed Lead Acid (SLA) Battery is a premium-grade rechargeable battery designed for emergency lighting systems, uninterruptible power supplies (UPS), alarm systems, toys, and other low-voltage DC applications across India. SANCA, a trusted manufacturer of lead-acid batteries since 1982, brings four decades of reliability to emergency power solutions. At ₹149 per unit, the Sigma 4V 2.5Ah represents exceptional value for households, offices, and commercial establishments requiring dependable backup power.

Sealed Lead Acid (SLA) technology eliminates the need for maintenance — no water refilling, no acid spillage risk, and no ventilation requirements. The 4V nominal voltage and 2.5 amp-hour capacity provide 10 watts-hour of stored energy, sufficient to power a standard emergency light bulb for 1 hour continuously, or multiple LED lights for 8-10 hours. The Sigma battery charges within 10-12 hours using a standard charger and can be recharged 300-500 times over its 5-7 year lifespan.

Key Features Breakdown – Why Choose SANCA Sigma?

• Sealed Lead Acid Technology – Maintenance-Free — Unlike wet lead-acid batteries requiring regular water top-ups, SANCA Sigma is fully sealed. Internal gases are recycled, eliminating acid fumes, spillage, or corrosion risks. Perfect for homes, offices, schools, and hospitals.
• 4V Nominal Voltage – Industry Standard — The 4V output is designed for emergency lights, alarm system backup, toys, and low-voltage DC applications. It is not for car starting but ideal for household backup power. Most standard chargers for 4V batteries are widely available at ₹300-500.
• 2.5Ah Capacity – 10 Watt-Hours Stored — A single Sigma battery can power a 10W emergency bulb for 1 hour, or a 2.5W LED light for 4 hours, or three LED bulbs for 8+ hours. An average emergency light consumes 5-10W, so one battery provides 1-2 hours of continuous illumination.
• Deep-Cycle Rated – Full Discharge Support — Unlike car batteries designed for high burst current, SLA batteries like SANCA Sigma are rated for deep-cycle use with repeated full discharge-recharge cycles. This makes them ideal for daily backup power use.
• 300-500 Recharge Cycles – 5-7 Year Lifespan — Depending on usage and charging practices, SANCA Sigma delivers 300-500 complete charge-discharge cycles. At one full cycle per week, this translates to 5.7-9.6 years of reliable service. Cost-per-year: ₹149 divided by 6 years equals ₹25/year.
• Wide Temperature Range – Works in All Climates — Operating temperature -20C to +60C. Works reliably in coastal areas with high humidity and salt air to desert regions with extreme heat. No performance loss in hot attics or cold basements.
• Compact & Lightweight – 0.8 kg — Weighing just 800 grams and compact in size, the SANCA Sigma fits easily into emergency light fixtures, UPS backup circuits, and alarm system cabinets.
• Rechargeable – Eliminates Waste — A single SANCA Sigma replaces 50-100 alkaline batteries over its lifetime, eliminating e-waste and recurring costs. Just one recharge cycle saves ₹100 in disposable battery purchases.

Technical Specifications – SANCA Sigma Battery

Step-by-Step Installation & First Use Guide

1. Unbox & Inspect — Remove battery from packaging. Check for physical damage or acid leaks. SANCA Sigma is sealed, so no liquid should be present.
2. Check Terminal Voltage — Using a multimeter, measure voltage across terminals. A new SANCA Sigma should read 4.2-4.3V. If below 3.5V, proceed to initial charge.
3. Prepare the Charger — SANCA Sigma requires a 4.6-4.8V constant-voltage charger rated for 250mA maximum. Standard emergency light chargers are compatible.
4. Connect Battery to Charger — Identify the positive (+) terminal and negative (-) terminal. Connect correctly to avoid reverse polarity issues.
5. Initial Charging – 12 Hours — Plug charger into 230V AC outlet. Green LED indicates charging in progress; it will turn red when fully charged.
6. Install in Device — Once charged, disconnect from charger. Insert battery into emergency light fixture, alarm system, or UPS circuit following device manual instructions.
7. Test the System — For emergency lights, switch off main power. The light should illuminate using battery power. For UPS, simulate power outage by unplugging.
8. Regular Maintenance — Charge every 6 months when stored without use to prevent deep discharge damage and extend lifespan.

SANCA Sigma vs Alternatives

vs Generic Lead-Acid Batteries — Generic SLA batteries cost ₹80-120 but have 5-10% monthly self-discharge and 2-3 year lifespan. SANCA Sigma at ₹149 lasts 5-7 years with 2-3% monthly self-discharge. Over 6 years: SANCA costs ₹25/year vs generic ₹30-50/year.

vs Alkaline Disposable Batteries — For 1-hour backup light, alkaline batteries need 4-8 units at ₹20-40 each equals ₹80-320 per use. SANCA Sigma at ₹149 provides 500+ recharges at ₹0.30 per use. Over 6 years: alkaline cost ₹3,000-6,000 vs SANCA ₹149.

vs Lithium Batteries — Lithium batteries cost ₹800-2,000 with 10+ year lifespan. SANCA Sigma at ₹149 covers 95% of emergency backup needs at 13x lower cost. Lithium is for high-drain devices; SANCA for emergency lights.

Why Buy from Faritha.com

• Authentic SANCA Product — Faritha is an authorized SANCA distributor. Every battery carries original packaging and manufacturing date verification.
• Lowest Price – ₹149 Only — Price-matched across major retailers. Faritha eliminates high-risk overhead to offer the best price.
• Same-Day Dispatch Before 2 PM — Order before 2 PM and receive same-day shipping from Madurai. Delivery across India in 3-5 days via Shiprocket.
• 1,42,000+ Customers Trust Faritha — Over seven years serving 142,000+ customers with 65% repeat purchase rate.
• 24/7 WhatsApp Support +91-7010973253 — Questions about capacity, charger compatibility, or installation? WhatsApp anytime. Average response 45 minutes.
• Battery Compatibility Guarantee — WhatsApp a photo of your emergency light and we confirm SANCA Sigma compatibility before charging.
• Free Shipping on Orders Above ₹1,000 — Order multiple batteries and shipping is free pan-India.
• 100% Prepaid Model — No cash-on-delivery. 100% prepaid ensures priority handling and on-time delivery.

Frequently Asked Questions

Q: Is my emergency light compatible with SANCA Sigma?
A: Most Indian emergency lights use 4V batteries. Check your light label for 4V or SLA 4V designation. If unsure, WhatsApp us a photo.

Q: How long will SANCA power my emergency light?
A: A 10W emergency bulb runs 1 hour per charge. LED lights (2-5W) run 4-10 hours. Most homes get 6-8 hours of backup light per full charge.

Q: What charger do I need?
A: Any 4.6-4.8V constant-voltage charger rated for 250mA works. Most emergency light fixtures include built-in chargers. Standalone chargers available at ₹300-500.

Q: Can I replace my existing 4V battery?
A: Yes, if your device currently uses 4V SLA battery. Disconnect old battery and connect SANCA Sigma using same terminal type.

Q: How often should I charge?
A: If used monthly, charge monthly after use. If stored, charge every 6 months to prevent deep discharge damage.

Q: What warranty comes with SANCA Sigma?
A: 12 months manufacturing warranty covers defects. Excludes physical damage, over-discharge, and misuse with incompatible chargers.

Q: Can I use in my car?
A: No. Car backup systems need 12V batteries. SANCA Sigma is 4V only for emergency lights and alarm systems.

Q: How do I recycle SANCA Sigma?
A: Lead-acid batteries are recyclable. Faritha can guide you to authorized battery recycling centers in your city.

Customer Testimonials

Rajesh Iyer, Kerala (Aug 2024) — "Office emergency light stopped charging. Ordered SANCA Sigma at ₹149, received next day. Installed immediately and working flawlessly for 3 months. Best ₹149 spent on office safety."

Priya Menon, Tamil Nadu (Sept 2024) — "Power cuts frequent in my neighborhood. Invested in 3 SANCA Sigma batteries for emergency lights in different rooms. Within a week, lights illuminated during 6-hour power outage. Charged afterward, back to full capacity."

Amit Sharma, Telangana (Oct 2024) — "Alarm system backup needed 4V battery. Called Faritha WhatsApp before buying to confirm compatibility. They responded within 30 minutes, confirmed SANCA Sigma was perfect. Service exceptional, product excellent."

Contact Faritha.com – Order Now

WhatsApp 24/7 Support — +91-7010973253 (45 minutes average response)
Email — sales@faritha.com (2-4 hours response)
Phone (Mon-Sat, 10 AM - 5 PM IST) — +91-8939-973-253

Ready to ensure reliable emergency backup power? Order the SANCA Sigma 4V 2.5Ah Sealed Lead Acid Battery at ₹149 from Faritha.com today. Same-day dispatch, free shipping on bulk orders, and official SANCA warranty. Money-back guarantee if not satisfied after 7 days of use. Power cuts won't catch you unprepared again!