You’re not keeping your battery charged enough.

According to Battery University, an educational website for information on battery technology and usage, lithium-ion batteries work best when their charge is kept anywhere between 65 and 75 percent. For most of us, this range is tough to maintain due to our on-the-go lifestyles, so try to keep your phone between ~25 and ~80 percent to keep your battery healthy. Be sure to check out our selection of wireless and wired iPhone chargers on the iDrop Store.