{"id":525,"count":9,"description":"
\r\n

Power Supplies & Batteries<\/h1>\r\n<\/div>\r\n
\r\n\r\nStandby batteries are used to maintain system operation in the event of a mains failure. The size of batteries required will depend on several factors:-\r\n
    \r\n \t
  • How much current the system takes in the normal condition<\/li>\r\n \t
  • How much current the system takes in the alarm condition<\/li>\r\n \t
  • How long the system is required to run in the event of a mains failure.<\/li>\r\n<\/ul>\r\nThe general requirement for battery backup is that the system is to be able to run for 24 hours, then run in alarm for 30 minutes with an 80% charge in the batteries. (This is to allow for batteries not being fully charged, battery degradation etc.)\r\n\r\nIf the building is likely to be unmanned for extended periods, one of the following should be considered:-\r\n
      \r\n \t
    • Fit standby batteries that will allow the system to run for 48 or 72 hours instead of the usual 24 hours<\/li>\r\n \t
    • Transmit the fault to an alarm receiving centre (via a Redcare box, or similar autodialler)<\/li>\r\n<\/ul>\r\nIn general terms, addressable systems tend to have a higher quiescent current than conventional systems, and will usually require a larger standby battery capacity.\r\n\r\nThe batteries should be replaced as part of the maintenance routine approximately every 5 years.\r\n\r\nIn order to calculate the standby battery size required, the following formula can be used:-\r\n\r\nBattery Size (Standby time in Amp Hours) = 1.25 x [(TALM x IALM) + (TSBY x (IQP + IQD))]\r\n\r\nWhere:\r\n
        \r\n \t
      • TALM= Maximum time in hours required for the alarm [\u00c2\u00bd hour is most common time]<\/li>\r\n \t
      • IALM = Total Alarm Current in amps for all alarm devices connected to the alarm circuits<\/li>\r\n \t
      • TSBY = Standby time in hours for the system after mains failure [normally 24, 48 or 72 hr]<\/li>\r\n \t
      • IQP = Quiescent current in amps of control panel in fault condition [because of mains failure]<\/li>\r\n \t
      • IQD = Quiescent current in amps of all devices on the system [detectors, sounders etc]<\/li>\r\n<\/ul>\r\n

        Typical Battery Usage<\/h2>\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n
        Battery Size<\/th>\r\nConventional System<\/th>\r\nAddressable System<\/th>\r\n<\/tr>\r\n
        2.2Ah<\/td>\r\nSmall System<\/td>\r\nNot suitable<\/td>\r\n<\/tr>\r\n
        7.0Ah<\/td>\r\nMedium System\/Small system - extended standby<\/td>\r\nSmall System<\/td>\r\n<\/tr>\r\n
        12Ah<\/td>\r\nLarge System\/Medium system \u00e2\u20ac\u201c extended standby<\/td>\r\nMedium System\/Small system \u00e2\u20ac\u201c extended standby<\/td>\r\n<\/tr>\r\n
        17Ah<\/td>\r\nLarge system \u00e2\u20ac\u201c extended standby<\/td>\r\nLarge System\/Medium system \u00e2\u20ac\u201c extended standby<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<\/div>","link":"https:\/\/www.zetaalarmsystems.com\/products\/emergency-systems\/power-supplies-batteries\/batteries\/","name":"Batteries","slug":"batteries","taxonomy":"product-category","parent":522,"meta":[],"acf":[],"yoast_head":"\nBatteries Archives - Zeta Alarms<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.zetaalarmsystems.com\/products\/emergency-systems\/power-supplies-batteries\/batteries\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Batteries Archives - Zeta Alarms\" \/>\n<meta property=\"og:description\" content=\"Power Supplies & Batteries Standby batteries are used to maintain system operation in the event of a mains failure. The size of batteries required will depend on several factors:- How much current the system takes in the normal condition How much current the system takes in the alarm condition How long the system is required to run in the event of a mains failure. The general requirement for battery backup is that the system is to be able to run for 24 hours, then run in alarm for 30 minutes with an 80% charge in the batteries. (This is to allow for batteries not being fully charged, battery degradation etc.) If the building is likely to be unmanned for extended periods, one of the following should be considered:- Fit standby batteries that will allow the system to run for 48 or 72 hours instead of the usual 24 hours Transmit the fault to an alarm receiving centre (via a Redcare box, or similar autodialler) In general terms, addressable systems tend to have a higher quiescent current than conventional systems, and will usually require a larger standby battery capacity. The batteries should be replaced as part of the maintenance routine approximately every 5 years. In order to calculate the standby battery size required, the following formula can be used:- Battery Size (Standby time in Amp Hours) = 1.25 x [(TALM x IALM) + (TSBY x (IQP + IQD))] Where: TALM= Maximum time in hours required for the alarm [\u00c2\u00bd hour is most common time] IALM = Total Alarm Current in amps for all alarm devices connected to the alarm circuits TSBY = Standby time in hours for the system after mains failure [normally 24, 48 or 72 hr] IQP = Quiescent current in amps of control panel in fault condition [because of mains failure] IQD = Quiescent current in amps of all devices on the system [detectors, sounders etc] Typical Battery Usage Battery Size Conventional System Addressable System 2.2Ah Small System Not suitable 7.0Ah Medium System\/Small system – extended standby Small System 12Ah Large System\/Medium system \u00e2\u20ac\u201c extended standby Medium System\/Small system \u00e2\u20ac\u201c extended standby 17Ah Large system \u00e2\u20ac\u201c extended standby Large System\/Medium system \u00e2\u20ac\u201c extended standby\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.zetaalarmsystems.com\/products\/emergency-systems\/power-supplies-batteries\/batteries\/\" \/>\n<meta property=\"og:site_name\" content=\"Zeta Alarms\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.zetaalarmsystems.com\/wp-content\/uploads\/2025\/02\/Zeta-featured-Image.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"700\" \/>\n\t<meta property=\"og:image:height\" content=\"500\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"CollectionPage\",\"@id\":\"https:\\\/\\\/www.zetaalarmsystems.com\\\/products\\\/emergency-systems\\\/power-supplies-batteries\\\/batteries\\\/\",\"url\":\"https:\\\/\\\/www.zetaalarmsystems.com\\\/products\\\/emergency-systems\\\/power-supplies-batteries\\\/batteries\\\/\",\"name\":\"Batteries Archives - 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The size of batteries required will depend on several factors:- How much current the system takes in the normal condition How much current the system takes in the alarm condition How long the system is required to run in the event of a mains failure. The general requirement for battery backup is that the system is to be able to run for 24 hours, then run in alarm for 30 minutes with an 80% charge in the batteries. (This is to allow for batteries not being fully charged, battery degradation etc.) If the building is likely to be unmanned for extended periods, one of the following should be considered:- Fit standby batteries that will allow the system to run for 48 or 72 hours instead of the usual 24 hours Transmit the fault to an alarm receiving centre (via a Redcare box, or similar autodialler) In general terms, addressable systems tend to have a higher quiescent current than conventional systems, and will usually require a larger standby battery capacity. The batteries should be replaced as part of the maintenance routine approximately every 5 years. In order to calculate the standby battery size required, the following formula can be used:- Battery Size (Standby time in Amp Hours) = 1.25 x [(TALM x IALM) + (TSBY x (IQP + IQD))] Where: TALM= Maximum time in hours required for the alarm [\u00c2\u00bd hour is most common time] IALM = Total Alarm Current in amps for all alarm devices connected to the alarm circuits TSBY = Standby time in hours for the system after mains failure [normally 24, 48 or 72 hr] IQP = Quiescent current in amps of control panel in fault condition [because of mains failure] IQD = Quiescent current in amps of all devices on the system [detectors, sounders etc] Typical Battery Usage Battery Size Conventional System Addressable System 2.2Ah Small System Not suitable 7.0Ah Medium System\/Small system – extended standby Small System 12Ah Large System\/Medium system \u00e2\u20ac\u201c extended standby Medium System\/Small system \u00e2\u20ac\u201c extended standby 17Ah Large system \u00e2\u20ac\u201c extended standby Large System\/Medium system \u00e2\u20ac\u201c extended standby","og_url":"https:\/\/www.zetaalarmsystems.com\/products\/emergency-systems\/power-supplies-batteries\/batteries\/","og_site_name":"Zeta Alarms","og_image":[{"width":700,"height":500,"url":"https:\/\/www.zetaalarmsystems.com\/wp-content\/uploads\/2025\/02\/Zeta-featured-Image.jpg","type":"image\/jpeg"}],"twitter_card":"summary_large_image","schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"CollectionPage","@id":"https:\/\/www.zetaalarmsystems.com\/products\/emergency-systems\/power-supplies-batteries\/batteries\/","url":"https:\/\/www.zetaalarmsystems.com\/products\/emergency-systems\/power-supplies-batteries\/batteries\/","name":"Batteries Archives - Zeta Alarms","isPartOf":{"@id":"https:\/\/www.zetaalarmsystems.com\/#website"},"breadcrumb":{"@id":"https:\/\/www.zetaalarmsystems.com\/products\/emergency-systems\/power-supplies-batteries\/batteries\/#breadcrumb"},"inLanguage":"en-US"},{"@type":"BreadcrumbList","@id":"https:\/\/www.zetaalarmsystems.com\/products\/emergency-systems\/power-supplies-batteries\/batteries\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/www.zetaalarmsystems.com\/"},{"@type":"ListItem","position":2,"name":"Emergency Systems","item":"https:\/\/www.zetaalarmsystems.com\/products\/emergency-systems\/"},{"@type":"ListItem","position":3,"name":"Power Supplies & Batteries","item":"https:\/\/www.zetaalarmsystems.com\/products\/emergency-systems\/power-supplies-batteries\/"},{"@type":"ListItem","position":4,"name":"Batteries"}]},{"@type":"WebSite","@id":"https:\/\/www.zetaalarmsystems.com\/#website","url":"https:\/\/www.zetaalarmsystems.com\/","name":"Zeta Alarms","description":"Specialist manufacturers of high quality fire alarm systems for over three decades","publisher":{"@id":"https:\/\/www.zetaalarmsystems.com\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.zetaalarmsystems.com\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Organization","@id":"https:\/\/www.zetaalarmsystems.com\/#organization","name":"Zeta Alarms","url":"https:\/\/www.zetaalarmsystems.com\/","logo":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.zetaalarmsystems.com\/#\/schema\/logo\/image\/","url":"https:\/\/www.zetaalarmsystems.com\/wp-content\/uploads\/2024\/02\/Zeta-White-1.svg","contentUrl":"https:\/\/www.zetaalarmsystems.com\/wp-content\/uploads\/2024\/02\/Zeta-White-1.svg","width":123,"height":44,"caption":"Zeta Alarms"},"image":{"@id":"https:\/\/www.zetaalarmsystems.com\/#\/schema\/logo\/image\/"}}]}},"_links":{"self":[{"href":"https:\/\/www.zetaalarmsystems.com\/wp-json\/wp\/v2\/product-category\/525","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.zetaalarmsystems.com\/wp-json\/wp\/v2\/product-category"}],"about":[{"href":"https:\/\/www.zetaalarmsystems.com\/wp-json\/wp\/v2\/taxonomies\/product-category"}],"up":[{"embeddable":true,"href":"https:\/\/www.zetaalarmsystems.com\/wp-json\/wp\/v2\/product-category\/522"}],"wp:post_type":[{"href":"https:\/\/www.zetaalarmsystems.com\/wp-json\/wp\/v2\/product?product-category=525"},{"href":"https:\/\/www.zetaalarmsystems.com\/wp-json\/wp\/v2\/installation-manual?product-category=525"},{"href":"https:\/\/www.zetaalarmsystems.com\/wp-json\/wp\/v2\/approval-certificate?product-category=525"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}