--- product_id: 344229960 title: "Visonic Siren Battery MCS-740 SR-740 PG2, PowerMax Bell Box (2pcs 7Ah)" brand: "xcelplus" price: "FREE" currency: EUR in_stock: true reviews_count: 8 url: https://www.desertcart.pt/products/344229960-visonic-siren-battery-mcs-740-sr-740-pg2-powermax-bell store_origin: PT region: Portugal --- # High Energy Density UL Certified Safety 7.0Ah Extended Life Visonic Siren Battery MCS-740 SR-740 PG2, PowerMax Bell Box (2pcs 7Ah) **Brand:** xcelplus **Price:** FREE **Availability:** ✅ In Stock ## Summary > 🔒 Secure Your Peace of Mind with Visonic! ## Quick Answers - **What is this?** Visonic Siren Battery MCS-740 SR-740 PG2, PowerMax Bell Box (2pcs 7Ah) by xcelplus - **How much does it cost?** FREE with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/344229960-visonic-siren-battery-mcs-740-sr-740-pg2-powermax-bell) ## Best For - xcelplus enthusiasts ## Why This Product - Trusted xcelplus brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Safety First:** Rest easy knowing your siren meets UL safety standards for peace of mind. - • **Dual Battery Advantage:** Maximize your security with the option for a second battery for enhanced reliability. - • **Seamless Compatibility:** Upgrade effortlessly with batteries compatible across all Visonic alarm systems. - • **Extended Life Performance:** Experience longer backup durations with 7.0Ah battery packs. - • **Lightweight Lithium Technology:** Enjoy the benefits of lightweight, high-capacity lithium battery packs. ## Overview The Visonic Siren Battery MCS-740 SR-740 PG2 features two 7Ah lithium-ion batteries, offering extended life and compatibility with all Visonic alarm systems. With the option for dual battery installation and UL certification, this product ensures optimal performance and safety for your security needs. ## Description Full description not available ## Features - Extended Life Battery: The Visonic MCS-740 siren is fitted with Extended Life 7.0Ah battery packs, which provide longer battery backup duration compared to the standard 3.5Ah and 4.0Ah batteries. This feature ensures a longer lifespan of the alarm system and offers the latest higher capacity replacement for your Visonic alarm. - Compatibility: The Extended Life 7.0Ah battery is compatible with all Visonic alarm systems, offering great value for money. This feature makes it easier for customers to upgrade their alarm system without having to replace their batteries. - Dual Battery Option: Although the MCS-740 and SR-740 PG2 must have 1 battery installed, Visonic recommends installing the optional second battery for greater backup duration and less maintenance. This feature provides a backup option in case the first battery runs out of charge, ensuring the alarm system continues to function optimally. - UL Conformity: To conform with UL installations, 1 to 2 batteries per siren must be installed. This feature ensures that the Visonic MCS-740 siren meets the safety standards set by the Underwriters Laboratories (UL) organization. - Lithium Battery Packs: The Visonic MCS-740 siren comes fitted with 1 & 2 2XER18505M lithium battery packs. This feature ensures that the battery packs are lightweight and have a high energy density, which translates to a longer lifespan and more extended backup duration. ## Technical Specifications | Specification | Value | |---------------|-------| | Manufacturer | XCELPLUS Security UK | | Product Dimensions | 6 x 5 x 7.5 cm; 140 g | | Batteries | 2 Lithium Ion batteries required. (included) | | Item model number | 2 x Batteries 7.0Ah | | Size | 2pcs 7.0Ah | | Shape | 2 x Batteries 7.0Ah | | Power Source | Battery Powered | | Voltage | 3.6 Volts | | Item Package Quantity | 1 | | Included Components | Batteries | | Batteries included? | Yes | | Batteries Required? | No | | Battery Cell Type | Lithium Ion | | Battery description | Lithium | | Item Weight | 140 g | ## Product Details - **Number of batteries:** 2 Lithium Ion batteries required. (included) - **Brand:** XCELPLUS - **Battery cell composition:** Lithium Ion - **Unit count:** 1.0 count - **Voltage:** 3.6 Volts ## Images ![Visonic Siren Battery MCS-740 SR-740 PG2, PowerMax Bell Box (2pcs 7Ah) - Image 1](https://m.media-amazon.com/images/I/710IVGCnAvL.jpg) ![Visonic Siren Battery MCS-740 SR-740 PG2, PowerMax Bell Box (2pcs 7Ah) - Image 2](https://m.media-amazon.com/images/I/71GBp5x2dFL.jpg) ![Visonic Siren Battery MCS-740 SR-740 PG2, PowerMax Bell Box (2pcs 7Ah) - Image 3](https://m.media-amazon.com/images/I/71RiT13jkQL.jpg) ![Visonic Siren Battery MCS-740 SR-740 PG2, PowerMax Bell Box (2pcs 7Ah) - Image 4](https://m.media-amazon.com/images/I/71iLjAvFhML.jpg) ![Visonic Siren Battery MCS-740 SR-740 PG2, PowerMax Bell Box (2pcs 7Ah) - Image 5](https://m.media-amazon.com/images/I/71r3R957hmL.jpg) ## Questions & Answers **Q: Is the date on the battery label the expiry date or the manufacture date?** A: It is the Manufacture Date. **Q: I ordered 2 3.6v 3.5ah batteries, the ones i received are 3.6v 7ah . can these 7ah batteries be used or do they need to be changed?** A: It needs to be the correct battery otherwise it will not work. **Q: Are these out of date** A: The date on the battery is the date of manufacture not the expiry date. **Q: Is tne above product the same as 2xer18505m p/n 103-304742??** A: This is the same item. The 7Ah version offers the newer longest life version. ## Customer Reviews ### ⭐⭐⭐⭐⭐ great product just love it and it fits great have it on all the time *by M***S on 16 February 2024* just got to get the alarm working now ### ⭐⭐⭐⭐⭐ Works with my alarm. *by T***N on 8 November 2023* After years of working at hight in trees etc it seems that now with age I am unable to work from ladders so I had to ask one of my lads to install these for me. Now, if he can do it then its quite easy. A lot cheaper than the alarm installer/provider wanted to charge by a long way and as I mentioned easy to do. ### ⭐⭐⭐⭐ Alarm *by K***R on 24 July 2019* These batteries are good up to now they are working well in our siren box hope it continues --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.pt/products/344229960-visonic-siren-battery-mcs-740-sr-740-pg2-powermax-bell](https://www.desertcart.pt/products/344229960-visonic-siren-battery-mcs-740-sr-740-pg2-powermax-bell) --- *Product available on Desertcart Portugal* *Store origin: PT* *Last updated: 2026-09-21*