Why Lithium-ion?

Compared with traditional battery technology, lithium-ion batteries charge faster, last longer and have a higher power density for more battery life in a lighter package. When you know a little about how they work, they can work that much better for you.

It charges fast for convenience and slow for longevity.

Your Apple lithium-ion battery uses fast charging to quickly reach 80 per cent of its capacity, then switches to slower trickle charging. The amount of time it takes to reach that first 80 per cent will vary depending on your settings and which device you’re charging. Software may limit charging above 80 per cent when the recommended battery temperatures are exceeded. This combined process not only lets you get out and about sooner, it also extends the lifespan of your battery.

Stage 1: Fast Charge

Gives you more power more quickly.

0%
80%
100%

Stage 2: Trickle Charge

Eases the electrical current to extend battery lifespan.

It makes charging easier.

Charge your Apple lithium-ion battery whenever you want. There’s no need to let it discharge 100 per cent before recharging. 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. The capacity of any type of battery will diminish after a certain amount of recharging. With lithium-ion batteries, the capacity diminishes slightly with each complete charge cycle. Apple lithium-ion batteries are designed to hold at least 80 per cent of their original capacity for a high number of charge cycles, which varies depending on the product.

One Cycle
Charges
+100%
Discharges
-75%
+75%
-25%
+25%

One charge cycle is completed after you’ve discharged 100 per cent of your battery’s capacity.