Definition

1. Noun:
   • Battery: A device that stores chemical energy and converts it into electrical energy, used to power portable electronic devices, vehicles, or as a backup power source. This is the most common meaning.
   • Accumulator / Rechargeable Battery: Specifically refers to a secondary cell or storage battery that can be recharged by passing an electric current through it, restoring its chemical energy.

Usage Examples

• Noun:
  • Xe máy hết bình điện nên không nổ máy được. (The motorbike's battery is dead, so it won't start.)
  • Hãy sạc đầy bình điện cho điện thoại trước khi đi. (Please fully charge the phone's battery before leaving.)
  • Cửa hàng đó chuyên thay bình điện ô tô. (That shop specializes in replacing car batteries.)

Advanced Usage

• "bình điện khô": dry cell battery.

  • Đồng hồ này dùng bình điện khô loại nhỏ. (This watch uses a small dry cell battery.)

• "bình điện ắc quy": lead-acid battery (commonly used for cars and motorbikes).

  • Anh ấy kiểm tra nước trong bình điện ắc quy. (He checks the water level in the lead-acid battery.)

Variants and Related Words

• Ắc quy (n): A common synonym for a rechargeable battery, especially a lead-acid type.

  • Ắc quy xe hơi cần được bảo dưỡng định kỳ. (A car battery needs periodic maintenance.)

• Pin (n): Often used for smaller, non-rechargeable (dry cell) batteries, but can overlap in usage with "bình điện" for smaller devices.

  • Remote TV hết pin rồi. (The TV remote is out of batteries.)

Synonyms

• Battery: The general term for an electrochemical cell providing power.
• Accumulator: A technical term for a rechargeable battery.
• Storage cell: Another technical term for a rechargeable battery.

Related Idioms

• Hết bình điện: Literally "out of battery"; used to describe a device with no power, or colloquially, a person who is exhausted.
  • Tôi cảm thấy như người hết bình điện vậy. (I feel like a person who has run out of battery [completely exhausted].)

noun

1. Battery, small-size dynamo