This MacBook Air 11" (Mid 2011-Early 2015) replacement battery is what you need to bring your dead laptop back to life! 100% factory tested. Tested and guaranteed to have a capacity greater than 4850 mAh. Spot tested by iFixit staff in San Luis Obispo, CA to ensure consistency of quality and capacity.
Thanks for your reply. In apple support page, I found below statement. "Your battery is designed to retain up to 80% of its original charge capacity at its maximum cycle count . For best performance, replace your battery when you reach its maximum cycle count." Where maximum cycle count for macbook air m1 shows 1000.
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