I bought my iPhone 16 Pro Max about two years ago. Since then, I’ve put it through 846 battery cycles, often with fairly heavy daily use.
And somehow, its maximum battery capacity is still sitting at 98%.
I don’t treat my phone like a fragile device, and I definitely don’t obsess over battery health every day. But looking back, I realized that I’ve consistently followed three simple habits that may have helped keep the battery in unusually good condition.
Here’s what has worked for me.
1. I Keep the Charge Limit at 80% Most of the Time
For everyday use, I set the iPhone’s Charge Limit to 80%.
When I’m traveling, know I’ll be away from a charger for a long time, or expect unusually heavy usage, I’ll temporarily raise it to 90%.
I almost never charge it all the way to 100%.
The logic is simple: lithium-ion batteries experience more stress when they spend long periods at very high states of charge. So instead of maximizing runtime from every individual charge, I’d rather reduce the amount of time the battery spends near full capacity.
For my usage pattern, 80% is usually more than enough.
2. I Try Not to Let the Battery Drop Below 20%
The other side of the equation is avoiding very low battery levels.
I don’t follow a strict “charge whenever possible” routine, but I do have one rule:
I try not to let the battery fall below 20%.
In practice, I usually start charging when it gets down to around 30–40%, then unplug it again when it reaches 80%.
Because I use my phone heavily, this sometimes means charging it one to three times a day.
That may sound like a lot, but I don’t think the number of charging sessions matters nearly as much as the conditions under which the battery is charged.
Short, partial charging sessions are perfectly normal for lithium-ion batteries.
3. Magnetic Portable Charger + Wired Fast Charging
This is probably the most unusual part of how I charge my iPhone.
I like the convenience of MagSafe, but I’m not a big fan of relying on wireless charging alone. It tends to be slower and can generate more heat, especially during longer charging sessions.
At the same time, a traditional wired setup is efficient, but not always the most convenient thing to carry around and use throughout the day.
So I ended up combining the two.
My preferred setup is a portable charger with magnetic attachment, paired with a short wired fast-charging cable.
It attaches magnetically to the back of the phone, so it still feels as convenient and portable as MagSafe. But the actual charging is done through the cable, which is faster, more efficient, and usually generates less heat than wireless charging.
For me, that combination matters because it removes almost all the friction from charging.
I can top up the phone whenever I have a chance, even for a short period of time. That makes charging once, twice, or even three times a day feel completely normal rather than something I have to plan around.
And that, in turn, makes it much easier to keep the battery roughly within the 20–80% range on a daily basis.
Battery Health Isn’t Something I Obsess Over
To be clear, I’m not suggesting that everyone needs to micromanage their battery.
Phones are tools, and I still use mine heavily every day.
But after 846 cycles and two years of use, seeing 98% maximum capacity makes me think these habits are probably doing something right.
My basic approach can be summarized very simply:
Stay below 100%.
Stay above 20%.
Make charging easy enough to do often.
Everything else is secondary.
