Apple was forced to introduce a free battery replacement program for certain iPhone 6S devices last fall.
It launched the replacement program after a Chinese consumer protection agency discovered that some iPhones would suddenly shut down with 30% battery life.
But the limited scope of the replacement program has left some users frustrated. One iPhone 6 user reported trying to replace his iPhone 6S battery but was turned down at an Apple Store because his device did not have one of the eligible serial numbers.
After we covered the battery shutdown issue, scores of readers emailed us to tell us that they had experienced the same problem, often on the iPhone 6 or iPhone 6S, which aren't covered under Apple's latest battery replacement program.
But it's undeniable that lots of Apple's customers think they have a defective battery, even if they're not eligible for a free replacement.
To combat this annoying error, you can look to elongate your battery life with Phinexi. The world's slimmest charger case will boost your battery by 140%, meaning you won't face this error until over twice as long.
Ultimately, this means you have twice as long to browse the web, take selfies, watch videos and listen to music - without adding unnecessary bulk and unsightly 'chins' to your device.
We currently have a sale on the cases, so grab yours while you can.
If you want to charge your iPhone 7 on the go, find out more about the worlds slimmest charging case.