If the mains power supply fails, the unit will switch to the external battery, which will continue to power the electrical device until mains power is resupplied, or the battery runs out. They are designed to be used with batteries with a capacity below 3Ah. Universal AC inputBattery charger UPS functionShort circuit, overload & over voltage protectionBattery low protectionBuilt in EMI filter100% full load burn-in testSuitable for security industry or battery backup systems.Listing and template services provided by inkFrog. The item "Mean Well 151.5W Dual Output Embedded Switch Mode Power Supply SMPS, 10.5 A, 500" is in sale since Wednesday, July 4, 2018. This item is in the category "Business, Office & Industrial\Electrical Equipment & Supplies\Electronic Components & Semiconductors\Circuit Boards & Prototyping\Printed Circuit Boards (PCBs)". The seller is "blueskycomponents" and is located in Maryport. This item can be shipped to United Kingdom, Antigua and barbuda, Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Australia, United States, Bahrain, Canada, Brazil, Japan, New Zealand, China, Israel, Norway, Indonesia, Malaysia, Singapore, South Korea, Switzerland, Taiwan, Thailand, Bangladesh, Belize, Bermuda, Bolivia, Barbados, Brunei darussalam, Cayman islands, Dominica, Ecuador, Egypt, Guernsey, Gibraltar, Guadeloupe, Grenada, French guiana, Iceland, Jersey, Jordan, Cambodia, Saint kitts and nevis, Saint lucia, Liechtenstein, Sri lanka, Macao, Monaco, Maldives, Montserrat, Martinique, Nicaragua, Oman, Pakistan, Peru, Paraguay, Reunion, Turks and caicos islands, Aruba, Saudi arabia, South africa, United arab emirates, Ukraine, Chile, Bahamas, Colombia, Costa rica, Guatemala, Honduras, Jamaica, Kuwait, Panama, Philippines, Qatar, Trinidad and tobago, Uruguay, Viet nam.