Battery app with notifications for 40/80%?

[MXBY]

As you may know, it's recommended that the lithium batteries in laptops are kept charged in the interval 40-80%.

I'm assuming that the same goes for iPhone and iPad.

Is there any battery app for iOS that can make notifications when the battery level reaches these (or otherwise configurable) thresholds?

 

[MagicBoy]

I think you'll find that's for long term storage with the device not in use.

 

[MXBY]

No, there are a lot of articles about this on the Internet.

See this one for instance:

http://www.wired.com/2013/09/laptop-battery/

Cadex Electronics CEO Isidor Buchmann told WIRED that ideally everyone would charge their batteries to 80 percent then let them drain to about 40 percent. This will prolong the life of your battery — in some cases by as much as four times. The reason is that each cell in a lithium-polymer battery is charged to a voltage level. The higher the charge percentage, the higher the voltage level. The more voltage a cell has to store, the more stress it’s put under. That stress leads to fewer discharge cycles. For example, Battery University states that a battery charged to 100 percent will have only 300-500 discharge cycles, while a battery charged to 70 percent will get 1,200-2,000 discharge cycles.

But you are right that for long-term storage the electronic device should have around 50 % in it. It shouldn't be full or empty because that can destroy the battery.

 

[MagicBoy]

Apple's recent batteries are rated 1000 cycles minimum, which is much higher than just about all other laptops or consumer devices. The advice in the Wired article may help with older pre-2009 devices using the older technology.

 

[C DM]

The ideal is perhaps to go with what's more optimal, however the real life "savings" you'll likely get from doing that vs. the hassle of monitoring it all constantly and plugging it in and unplugging it at particular times is unlikely to be worth it.