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Did i broke my brand new battery? Answered

I bought a brand new 12volts 12amps battery and use it to charge my phone through a car charger but i made a mistake and reversed the connection of terminal, did i broke my battery?

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ive done that too. you fried the 5v usb charger.

How long were they reversed for? What happened when they got reversed? Did the terminals get shorted, or was the connection just reversed to the car charger? Does the battery hold a charge now?