How accurate is a coconutBattery readout by a Mac?

[augenleet]

Hi everyone,

after the 6S battery incident (mine is not supposed to be affected) I got curious about my 6S's battery health and used coconutBattery to read out that information.

So what came out is that my battery is supposedly at 77% health after just 233 cycles. Apple's official website states that the iPhone battery should be around 80% at 500 cycles, so I thought my battery might be wearing too quickly (especially since I treat it well).

I was going to go to an Apple Store and ask if that warrants a battery exchange, but now after double checking with coconutBattery, my battery health is stated to be at 85%, which still is not a great, but not worth an exchange.

Has someone experienced such behavior with coconutBattery? Is the tool just inaccurate or is it even a sign of a dying battery to show different capacities?

 

[Rok73]

should be around 80% at 500 cycles

Should be... It really depends on how you treated your battery. If it ran completely empty oftentimes then it could lead to less health with less cycles e.g.

 

[augenleet]

Should be... It really depends on how you treated your battery. If it ran completely empty oftentimes then it could lead to less health with less cycles e.g.

Yes, I realize that. That's why I usually charge my battery at 30-40% and over USB as opposed to an outlet. My question is whether the shown inconsistency in battery capacity is caused by the tool or the battery itself.

 

[BigMcGuire]

I use coconutBattery - used it for years - used it on iOS when it worked (before the last iOS release).

Your question is, is it accurate? Depends on how you use it. Only trust the % when you're at 100% charged. Even then, 3-5% variance CAN be seen (though I only notice a 1-2% variance). I've noticed up to a 10% variance if I check when the phone isn't charged 100% so I NEVER look at the design capacity until I'm 100% charged.

I've noticed that after a major (not minor) OS or iOS upgrade - sometimes a drain to 0 will bring a more accurate reading.