battery

/ˈbætəɹi/noun

A unit made of one or more chemical cells that stores energy and supplies electricity to devices.

Example sentence

“My phone's battery died right in the middle of the call.”

Also a legal term: "assault and battery" means unlawful physical contact. The phrase "a battery of tests" means a whole series of them.

Related words

chargerA device used to fill or refill something with electrical power.networkA group of things or people that are connected to each other in some way.wirelessWorking without wires or cables.websiteA group of linked web pages that share the same base address and are usually hosted on one server.deviceA tool or piece of equipment, often mechanical or electronic, designed to do a specific job.passwordA secret combination of letters, numbers, or words typed in to gain access to a computer, account, or network.