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Why smartphones drain battery even when turned off

Even when powered off, smartphones continue to consume a small amount of battery power. This drain is primarily due to a clock-and-wake circuit that allows the device to respond to the power button and maintain accurate time upon startup. Additionally, lithium-ion batteries naturally undergo self-discharge, losing approximately 1-2% of their charge monthly, a process accelerated by higher temperatures. For long-term storage, Apple recommends charging an iPhone to about 50% and recharging it every six months to prevent deep-discharge states that can permanently damage battery capacity. AI

RANK_REASON Article explains a common technical phenomenon without announcing new products or research.

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Why smartphones drain battery even when turned off

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  1. Engadget TIER_1 English(EN) · [email protected] (Christine Persaud) ·

    Why do phones still use battery when powered off?

    Your battery is continually losing charge.