[Activities]how to downgrade flyme 6.2.0.0g to 6.1.0.0g in meizu m3 note L 681H?

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2018-01-18 17:59

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after upgrade  on flyme 6.2.0.0g my battery  drain very when charge are 30%. in 1 mins battery  goes down into 1%. that's  why i need  downgrade  process . please  help me.