I beg to differ. We need to correct our mindsets about battery.
All types of batteries are consumable that deteriorate over time whether they are being used or kept uncharged.
Time and number of times a battery has been charged are not the only factors in the chemical ageing process.
Usage pattern and environment will affect the performance of a battery over its lifespan
If you are solely talking about the batteries, depth of discharge or even memory effect may have a little bearing.
Nevertheless, we need to take into account the interventions of the iOS operating system.
iOS software charges the lithium-ion battery until 80% and then quickly switches to slow trickle charging.
Straight advice from Apple is to just charge the Apple lithium-ion battery whenever you want.
Apple lithium-ion batteries work in charge cycles.
You complete one charge cycle when you’ve used (discharged) an amount that equals 100 per cent of your battery’s capacity — but not necessarily all from one charge. For instance, you might use 75 per cent of your battery’s capacity one day, then recharge it fully overnight. If you use 25 per cent the next day, you will have discharged a total of 100 per cent, and the two days will add up to one charge cycle. It could take several days to complete a cycle.
[attachmentid=9877116]
[attachmentid=9877117]
Bro we are talking about the similar thing, there is no much argument here. We are talking about it is better to strain the battery less, the longer u charge the hotter the battery gets. the advise is not to wait until less than 20% only charge and die die must charge to 100% as what our father mother told us. That's why apple say u can charge whenever u want, and those articles throughout the internet backed by facts.