Straight from Apple (not about right outta the box)You can do whatever you want. Anything you hear about needing to do a certain charge method is an old wives tail left over from older battery technology generations. There is no evidence for conditioning modern lithium ion batteries.
Use iPhone Regularly
For proper maintenance of a lithium-based battery, its important to keep the electrons in it moving occasionally. Be sure to go through at least one charge cycle per month (charging the battery to 100% and then completely running it down).
You can do whatever you want. Anything you hear about needing to do a certain charge method is an old wives tail left over from older battery technology generations. There is no evidence for conditioning modern lithium ion batteries.
Boggles the mind that it's still peddled out every year.