The best way to get the best battery life is to have as many cells as possible.
That’s the takeaway from a new study by research firm Insights West.
The company says the study also found that battery life on an iPhone 5s is the best it has ever measured.
“We have been using iPhones for five years and have seen that iPhone batteries can last up to 8 years, which is pretty impressive,” InsightsWest’s senior product analyst, Michael McAndrews, said in a phone interview.
“So if you are a frequent user, that’s the number you need.”
The study focused on a cell phone battery, which can contain up to 12 cells, or a single cell.
The researchers also looked at other types of cell phones, such as laptops and tablets, and found that they too can last much longer.
The iPhone 5S has the highest battery life of any iPhone model tested, with a battery life exceeding 8 years on average, according to InsightsEast.
The iPhone 5 is the only one of the three models tested to outperform the previous iPhone, which had an average battery life that was 8.5 years.
The study’s findings are based on a battery of iPhones using the latest version of Apple’s iPhone operating system, iOS 11.
Apple released iOS 11, which includes the latest versions of iOS and iCloud, last month.
The software also has an improved camera and camera settings, a new Siri voice assistant, a revamped user interface and new features.
The company says that iPhone battery life has been measured in real-world use, so the results are not necessarily applicable to everyone.
However, McAndrew’s team said that they wanted to measure the best performance for consumers who are most likely to use their iPhones.
The battery life test included the iPhone 5 and a similar iPhone, the iPhone 4S.
In the first test, Insights East looked at a battery that had been charged with the iPhone’s original, battery-life-only battery.
In a second test, the battery was charged with a cell with the company’s own battery pack.
In the second test on an older iPhone 5, the researchers measured battery life in increments of 10 minutes, with the average lasting 7.5 minutes.
In that second test the battery life reached 8.1 hours.
In all of the tests, Insys found that the iPhone battery lasts for longer than the average for all iPhone models tested.
Insights East’s report comes at a time when Apple is working to improve the iPhone experience for users who are not frequent users of the phones.
Earlier this year, the company said that users who buy new iPhones and iPads should only use the phone for short periods of time, such on the weekend.
Insights says it believes that the new iPhone has a better battery life than the iPhone 6S, which the company released in March.
“There’s definitely an improvement in the battery on the iPhone,” McAndrew said.
“But that’s not to say it’s the best we’ve ever measured.”