Just bought a new battery, do I have to charge it fully prior to use?

Q: Basically, my insurance sent me a new laptop battery for my acer laptop and I was wondering if im supposed to charge it for 10 hours? I inserted the battery and it had 100% and it lasted about 15 mins b4 i had to plug in the charger. Is the battery crappy or should i turn off the pc and let it charge for 10 hours b4 using it?

A: Let it charge for 1 hour, use it down till 10%, then charge again... Slowly, the battery life should increase

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