Backup battery
What is a backup battery supply
A secondary power supply is always helpful for continued supply of power in the event the main power supply fails. A back up supply is necessarily an electronic device having an inverter and a charger. This inverter is used to convert an input battery voltage to the required AC supply which can support the needs of electricity when your power fails. The backup supply unit gets charged while the mains power supply is on. Backup battery power supply is mostly used in computers, in laptops in home appliances, and in other devices where maintaining power in essential.
The supply of power is often disrupted during storms and heavy rains. It is at that time that, home owners are in need of a backup battery power supply to heat or cool their homes, and run, telephone, home or office computers, sump pumps or other necessary appliances, such as, the lights. Back up supplies can also be used for critical medical devices, large computer networks, etc. Backup power supplies come in different specification and capacity, providing the required power to the essential appliances and devices during absence of the main supply.
What are the components a a backup battery supply?
The basic component that goes into a back up supply is the inverter and the charger, along with a bank of DC batteries. The power received from the mains is converted into a DC voltage by the inverter-charger, which is utilised to charge the batteries. This power simultaneously supplies power to the equipment or the appliances. The backup battery supply is not designed to meet your power requirement for a very long period of time, and a typical capacity of a 2,000 to 4,000 watt back up supply could meet up to 2 to 12 hours of your supply requirements.
Backup battery in your personal computer
The personal computer that you have, should essentially have an external back up supply to retain the work that you have been doing while the main power supply went off. In addition to this, a small button-like battery in your PC provides a backup supply to the computer BIOS and the real time clock. The backup power comes into operation as soon as you switch off your computer. This power keeps the BIOS alive and the clock as well, so that when you switch on your computer again, your computer boots properly, with the real time clock providing you with the right time and date.
Your PC battery has limited life time, and it should be replaced at regular intervals. If this is not done, you will lose the BIOS information, which may provide with errors as you boot your computer. The real time clock will lose the current time and wrong time and date will be displayed on your screen.
Backup battery in your laptop
Most of the laptops today have Li-Ion as its backup battery. When the battery is new, it should be charged to provide you with the maximum working capacity. Li-Ion batteries do not have memory effects as is the case with Ni-Cd. It is important to note that, though Li-Ion batteries need to go through the charge discharge cycle, at least 2 to 3 times, once a month, and care must be taken not to discharge the battery completely. In discharging the battery completely, the cells in the battery get damaged beyond recovery. It is a high density battery, packing in more power than any other batteries.
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