how big is the battery that an iPhone 7 plus needs

Question: how big is the battery that an iPhone 7 plus needs
- Keywords:
  batteries,
  iPhone 7,
  phones
Asked by rawlingd16 on 30 Jan 2017.
- Craig Fisher answered on 30 Jan 2017:
  
  The iPhone 7 plus uses a 2,900 mAh battery, giving a quoted talk time of 21 hours using 3G, or around 13 hours on the internet. This is about 5 low-cost AA batteries, or slightly more than a high-end (expensive) alkaline AA battery, and an increase of about 250 mAh from the battery of the iPhone 6 plus. In terms of physical size, it takes up around half of the phone’s volume. I’ll let you decide whether the battery’s capacity is big enough or not!