Rechargeable battery with a backup

Discussion in 'English Only' started by Madonna Halim, Feb 6, 2018.

  1. Madonna Halim Senior Member

    Arabic
    The product is Microsoft GU500013 Universal Foldable Keyboard, it's written that it has " Rechargeable battery with a backup of about 3 months on a single charge". What's meant by "backup" here? It can be "used" for about 3 months?
     
  2. aceofpace

    aceofpace Senior Member

    English (American)
    Looking at the context it most likely means here that you can use the battery for up to 3 months after a charge.
     
  3. Madonna Halim Senior Member

    Arabic
    so the word "backup" here is incorrect?
     
  4. aceofpace

    aceofpace Senior Member

    English (American)
    Right. Backup in essence means a "reserve" and it's clearly not used this way here.
     

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