Skytronic 656.821 - 12V 7.2Ah Sealed Lead Acid Battery (Maintenance-Free)

Skytronic 656.821 - 12V 7.2Ah Sealed Lead Acid Battery (Maintenance-Free)

The Skytronic 656.821 is a 12V 7.2Ah sealed lead-acid (VRLA/SLA) rechargeable battery designed as a reliable replacement for security systems, UPS, emergency lighting, and continuous or standby electronic equipment. Maintenance-free , with very low self-discharge, and leak-proof , it offers a long-lasting and safe solution for professional and domestic applications. Its standard 151 × 65 × 95 mm and 1.95 kg size facilitate direct replacement in standard 12V/7Ah–7.2Ah compartments.

Main features

• Technology: Sealed VRLA/SLA, maintenance-free and spill-proof.
• Nominal voltage/capacity: 12 V – 7.2 Ah (typical capacity at C20).
• Self-discharge: very low, suitable for use in flotation and backup.
• Rugged design: Heavy-duty housing for continuous use.
• Dimensions (L × W × H): 151 × 65 × 95 mm.
• Weight: 1.95 kg.
• Compatibility: Replacement for 12V/7–7.2Ah in UPS, alarms, CCTV, access control and emergency lighting.
• Charging: Supports float and cyclic charging with voltages typical for 12V VRLA batteries (see recommendations below).

Product benefits

• No periodic maintenance: no electrolyte refill required.
• Safe and clean: Sealed and spill-proof construction to prevent leaks.
• Backup reliability: stable performance in standby applications and moderate cycle usage.
• Easy replacement: Standard dimensions make it easy to install on multiple brands and compatible equipment.

Use cases

• Home and office UPS: power maintenance during short-term power outages.
• Security: 12V alarm systems, CCTV, and access control.
• Emergency lighting: luminaires and cabinets with 12 V/7–7.2 Ah pack.
• Electronics and projects: auxiliary sources, instrumentation and hobby.

Frequently Asked Questions

Does it need maintenance?
No. It is a sealed, maintenance-free battery.

What charging voltages should I use?
For 12V VRLA batteries, typical reference ranges are float: 13.5–13.8V and cycle: 14.4–14.9V at 20–25°C, temperature compensated . Use a dedicated VRLA/AGM charger and limit the initial current according to the charger.

What terminal do you use (F1/F2)?
May vary depending on the batch or destination device. Check the Faston type (4.8 mm F1 or 6.3 mm F2) required by your device before purchasing.

How to store it?
Store charged in a cool place and recharge periodically for maintenance if it will not be used for several months.

Recommendations for use and safety

• Respect polarity and avoid short circuits.
• Use chargers suitable for 12V VRLA/AGM with voltage control.
• Do not expose to extreme temperatures or heat sources.
• Recycle the spent battery according to local regulations.

Description for projects

12 V, 7.2 Ah sealed VRLA/SLA battery; maintenance-free; low self-discharge; leak-proof construction; dimensions 151 × 65 × 95 mm; weight 1.95 kg; suitable for float and cycle use with typical 12 V VRLA voltages.