The original Apple 8plus battery is a lithium-ion rechargeable battery with a capacity of 2,675 mah.
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When using wireless peripherals
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Talk time: Up to 21 hours
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Internet use: up to 13 hours
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Wireless video playback: up to 14 hours
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Wireless audio playback: up to 60 hours
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Fast charging: Up to 50% charge in 30 minutes, using a power adapter of 18 watts or more (purchased separately).