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Chronixx t1_j4g5kzc wrote

Reply to comment by TWYFAN97 in is 3-4% battery drain overnight normal? by ItzMeShadow69

That’s not normal. My 12 Pro Max might lose a % overnight, it sips nothing at all. Always been like this as far back as I can remember with all of my iPhones, iOS has always been legendary for its standby time.

Last time they actually tested standby time (iPhone 7 Plus), they claim 15 days of it. Have to assume it’s at least that if not significantly greater with the advances of battery size and their SoCs in the 7 years since that phone’s release

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ARandomPerson209834 t1_j4ok3p9 wrote

My iPhone SE 2020 (81% battery health, or max capacity at 1475 mAh out of 1821 mAh) drained 25% in 19 hours. That's 1.3% per hour. Theoretically it could last about 4 days of standby time.

Meanwhile the newer iPhone 13 Pro Max could last a couple weeks of standby time, and the older 5s will gulp down battery quicker.

It all depends on the model of your phone. Losing a percentage overnight is undoubtedly legitimate given the plus size of that phone and the battery health, however a 5~15% overnight drain is typical and completely acceptable. That said, leaving your phone to charge overnight is the best approach and saves you from unnecessary worries.

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Chronixx t1_j4u5g3h wrote

It’s not normal. That same support article states a fresh iPhone 7 would last 9 days. That’s less than half a percent every hour. 3-4% over an 8 hour period but I’d expect much less than that. Batteries and the way iPhones consume their power have been become more efficient since 2016.

I can also confidently say I’ve never seen what I would consider to be excessive battery drain on any iPhone I’ve ever had without some sort of software issue behind it.

Found an article of someone who made their iPhone 5 survive nearly a week between charges (with some pretty unrealistic usage) which has to suggest the battery was using pretty much nothing in standby time. iPhones have always been legendary for standby time, like I said above

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