Power your household devices and battery-operated appliances with our vast selection of alkaline batteries. Find traditional sizes, like AA, AAA, C, D, and 9 volt, as well as unique, harder-to-find …

With dependable starts, power for multiple electronics, and the latest in technology, your local AutoZone store has the right battery to fit your needs. Plus, you be sure of your repair with free battery testing …

O’Reilly Auto Parts offers free battery testing for cars, trucks, SUVs, commercial and heavy-duty vehicles, and powersport batteries. Batteries can be tested in or out of the vehicle and charged in the …

When a battery is connected to an external electric load, those negatively charged electrons flow through the circuit and reach the positive terminal, thus causing a redox reaction by attracting …

Battery World provides battery recycling, diagnostics, warranties and mobile repair.

Dec 12, 2025 · Batteries are divided into two general groups: (1) primary batteries and (2) secondary, or storage, batteries. Primary batteries are designed to be used until the voltage is too low to operate a …

Historically, the word "battery" was used to describe a "series of similar objects grouped together to perform a function," as in a battery of artillery. In 1749, Benjamin Franklin first used the term to …

Once charged, the battery can be disconnected from the circuit to store the chemical potential energy for later use as electricity. Batteries were invented in 1800, but their complex chemical processes are …

Oct 7, 2025 · Average battery life has become shorter as energy requirements have increased. Depending on the depth of discharge, battery life can range between 6 to 48+ months—yet only 30% …

Battery University™ is a free educational website offering hands-on battery information.