Question about Battery Basics Computers & Internet
I assue you connected the UPS to a TV to test the UPS unit.
Batteries in the UPS typically last 3 to 5 years and it depends upon several factors. including the number of times the unit must go on battery power and environmental conditions. There are usually several batteries in the UPS and while the battery voltage may show 13 volts, this may only be a float charge/voltage and a true indication of the battery voltage and condition requires the batteries to be tested under a load. If one battery in a set of batteries that is faulty and causes the whole battery system to fail and indicate a battery fault. A faulty charging circuit will not charge batteries and will cause a fault condition.
These lower powered and cheaper type UPS are switch over types, when the mains supply fail, the UPS switches over to the battery and inverter in milli-seconds which then supplies mains power. A faulty inverter circuit and or flat batteries won’t deliver standby power when the mains supply fails.
Posted on Nov 18, 2009
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Posted on Jan 02, 2017
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