Definition

Noun: * Battery: A device that stores electrical energy through chemical reactions and provides it as direct current (DC). It is commonly used in vehicles, backup power systems, and various electronic devices.

Usage Examples

• Noun:
  • Xe ô tô cần một bình ắc qui mạnh để khởi động. (The car needs a strong battery to start.)
  • Đèn pin này dùng pin tiểu, không dùng ắc qui. (This flashlight uses dry-cell batteries, not a rechargeable battery.)
  • Ắc qui của chiếc xe máy cũ đã hỏng. (The battery of the old motorbike is dead.)

Advanced Usage

• "ắc qui khô" / "bình ắc qui kín khí": Refers to a maintenance-free or sealed lead-acid battery, commonly used in modern vehicles.
  • Hầu hết xe ô tô ngày nay đều dùng ắc qui khô. (Most cars today use maintenance-free batteries.)
• In technical contexts, "ắc qui" specifically implies a rechargeable secondary cell (like a lead-acid battery), as opposed to single-use "pin" (dry-cell batteries).

Variants and Related Words

• Ắc-quy: An alternative spelling with a hyphen.
• Bình ắc qui: A common compound noun emphasizing the container ("bình") of the battery.
• Pin sạc (Rechargeable battery): A more modern and general term for rechargeable batteries, often used for smaller devices like phones or laptops, which may use different chemistry (e.g., lithium-ion) than traditional lead-acid "ắc qui".
• Ắc (slang): A common shortened form in casual speech.
  • Xe tôi hết ắc rồi. (My vehicle is out of battery.)

Synonyms

• Bình điện: Literally "electricity container," a less common synonym.
• Pin (Battery/Cell): A broader term. "Pin" often refers to non-rechargeable dry-cell batteries (e.g., AA, AAA) or, in modern usage, rechargeable cells in electronics. "Ắc qui" is a specific type of rechargeable pin.

Related Phrases

• Hết ắc qui / Ắc qui chết: Means the battery is dead, flat, or has no charge.
  • Xe không nổ máy được, có lẽ đã hết ắc qui. (The car won't start; perhaps the battery is dead.)
• Nạp ắc qui / Sạc ắc qui: To charge a battery.
  • Tôi cần nạp ắc qui cho xe máy. (I need to charge the battery for my motorbike.)
• Xả ắc qui: To discharge a battery.
• Điện áp ắc qui: Battery voltage (e.g., 12V for a car).

noun

1. battery
   • nạp ắc qui
     to charge a battery