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Z Flip Battery Drain when SWITCHED OFF

(Topic created: 11-23-2022 06:38 PM)
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Clive1969
Constellation
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Galaxy Z Flip

I have a Z Flip 3 which is now 11 months old. It was bought as a backup phone and has only ever been used a handful of times for text messages. It has an appalling battery life so I have tested as follows:

1) Phone SWITCHED OFF: Charged to 100%, then once a day switched on for about 30 seconds to check for battery %.  Battery charge after 10 days has declined to 75% . The rate of decrease is linear.

1) Phone SWITCHED ON: Charged to 100%, then once a day (without any other use) noted the battery %.  Battery charge has decreased to 0% in 4 days. The rate of decrease is linear.

I understand from other posts that the battery charge life of Z Flip 3 phones is poor, but my question is, should a battery which is essentially OFF decrease by 25% in 10 days?

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tom2055
Supernova
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Galaxy Z Flip
That's completely normal for there to be battery drain while switched off, just the nature of lithium ion batterys.