The iPhone battery
If you look after the battery in your iPhone properly then it will not degrade meaning you can use your Phone, iPad or iPod for longer without having to recharge it.
Typically, an iPhone lithium-ion battery will last for 3 to 5 years, and chances are you’re going to want to swap out your iPhone before then. The minor damage caused by, say leaving your phone plugged in all night every night, might be worth the convenience for you.
However, it is pretty easy to keep your battery healthy by following the tips listed below. Honestly, the next time you make it back home with power to spare, you’ll thank yourself for it.
Battery Life Tip 1: Keep your battery between 40% – 80% full
You may vaguely recall hearing something about rechargeable batteries and the “memory effect.” You know, that if you don’t “teach” your rechargeable batteries their full potential by taking them from totally full to totally empty, they’ll “forget” part of their capacity.
Well forget all that for the iPhone, iPod and iPad — it’s wrong.
Battery memory is a real thing, but it applies to nickel-based batteries; your Apple device has a lithium-ion battery and it needs to be treated a little differently. Specifically, it should be topped up whenever you get the chance.
To get the most out of a lithium-ion battery, you should try to keep it more than 50% charged at all times. Going from all the way full to all the way empty won’t help. In fact, it’ll do some damage if you do it often. That said, it’s a good idea to do 1 full discharge about once a month for “calibration,” but don’t do it all the time. Fully charging and discharging your battery won’t make it explode or anything, but it will shorten its lifespan.
You don’t want to have it charging all the time either as lithium-ion batteries can get overheated. Luckily for you, your charger is smart enough to help with this, and will cut your phone off for a spell once it’s full.
To complicate matters your battery doesn’t particularly like being all the way full either. In fact, your battery will behave the best if you take it off the charge before it hits 100 percent, and leaving it plugged in when it’s already full is going to cause a little degradation.
So if you’re really particular about optimizing your battery’s life, you should try to go from around 40% to around 80% in one go. A bunch of small recharges is far better than going from 100% down to 0% all the time.
Battery Life Tip 2: Keep your iPhone cool
It’s easy to worry about losing the charge on your iPhone with the lessons we have learned with old rechargeable batteries, but your iPhone has a worse enemy. Heat.
Your iPhone’s battery will degrade much much faster when it’s hot, regardless of whether it’s being used or just sitting around doing nothing.
At an average temperature of 0°C, a lithium-ion battery will lose 6% of its maximum capacity per year. At 25°C, that number jumps to 20%, and at 40°C it’s a whopping 35%.
It might not be practical to keep your iPhone in the fridge, but it is worth avoiding keeping it in hot cars and the like.
More tweaks on the next page.