CMOS batteries power code that runs before the operating system is loaded in a computer. Common tasks completed before your operating system loads are activating the keyboard, loading the system drives and setting the system clock. Because the system clock is controlled by a CMOS battery, one of the most common methods of identifying CMOS battery problem is noticing that your computer has a problem maintaining the correct time.Know More
Complementary metal-oxide-semiconductor batteries power basic input-output system settings. BIOS settings control things such as loading your operating system, managing system memory and operating the keyboard.
Every action that is completed by the computer before your operating system loads is accomplished by the BIOS. Some functions controlled by the BIOS include verifying that all the computer hardware is working properly, managing communications between the computer and its peripherals, such as the printer and monitor, and making sure the system clock and computer drives are working properly.
Most CMOS batteries are made out of lithium. Lithium batteries, also called CR2032 cell batteries, are similar to the types of batteries that are found in watches. To replace a CMOS battery, turn off and unplug the computer, remove any cables, and open the computer case. The CMOS battery is on the computer’s motherboard. Follow the computer manufacturer's directions for removing the battery.
Other than problems maintaining the correct time, other signs of CMOS battery problems are error messages that appear computer start-up. Common errors include CMOS checksum errors, CMOS battery failure errors and CMOS read error messages.Learn More
An AGM battery, commonly used in ATVs and motorcycles, is a type of sealed battery with a fiberglass mat sandwiched between the battery's plates to hold the electrolyte. AGM stands for "absorbed glass mat" in reference to the fiberglass sheet.Full Answer >
Car battery chargers connect to car batteries with positive and negative cables and clamps, which are usually red and black and marked with a plus and minus sign. The positive clamps connect to the positive posts on the batteries themselves, and the negative clamps connect to vehicle frames or some other unpainted surface away from the battery.Full Answer >
To jump start a car battery, expose the dead and working batteries, connect them with jump leads, start the working car, wait one minute, start the other car, wait several minutes, and unlink the batteries. This 45-minute procedure requires jump cables and a car with a working battery.Full Answer >
To change a car battery, loosen the nuts that secure the cables to the terminals, and then lift the battery out of the car to exchange it for a new one. Wear gloves and safety glasses to protect yourself from acid leaks.Full Answer >