Fat Battery is a simple modification for your iPhone 6s, delivering supercharged 4x battery power so your battery lasts 4x longer!
About this project
Fat Battery is an incredible modification for your iPhone 6s, delivering supercharged 4x battery power. This is the ultimate companion if you can’t run out battery life.
Instead of a bulky battery case, we’ve developed a battery replacement process that adds a bigger battery inside your iPhone. It’s as simple as getting your phone repaired at the mall while you wait. The end result is sleek; your phone will be bigger, but think of it as packing on muscle. It’s the kind of bigger you want.
Why You Need Fat Battery
“Fat Battery started two years ago, when I was working as a producer for a video game. I used the phone all the time, because I was constantly moving around the office, almost never at my desk. But my phone seemed to need to be tethered to my desk, charging, for half the day. Even those battery cases sometimes weren’t enough, and I decided then that the world (or at least me!) needed a better option!” –Justin Leader, CEO
How Does it Work?
Instead of a removable battery pack or case, Fat Battery is a physical upgrade to your iPhone. We’ve designed it to be very similar to a iPhone screen repair: you pop open the phone, separate the screen and the back, and insert the Fat Battery and Spacer, then reassemble. You can do it yourself or bring it to almost any iPhone repair shop. Our simple instructions and video will
You simply remove your phone’s back, insert our new, larger battery, and add a spacer that matches the look and feel of the phone while giving more room for the battery. Similar to external battery packs, the upgrade will make your phone fatter. Unlike the battery packs, however, Fat Battery is inserted under the skin of the iPhone, which means a slimmer, more aesthetically pleasing result that fits more naturally with the original look of your phone. And again, Fat Battery provides more than double the impact of bulkier charging cases.
Prototype Assembly video
Our current battery-testing prototype was completed on an iPhone 6. Note that this test does not include the Spacer. This is a battery test only. Here is a teardown video of the process!
What about the iPhone 7?
We’re planning on making a second edition for the iPhone 7 and the iPhone SE in 2017, but it won’t be unless this campaign succeeds. All Kickstarter backers will have a reserved front-of-line spot to order subsequent Fat Battery products for the 7 and SE.
Risks and challenges
All computers, of course, generate heat. Heat in the iPhone comes from both the chips and the battery, Because Fat Battery is larger, it will generate more heat with less surface area to distribute it, so it will be important that the Spacer provides adequate heat transference.
In the iPhone, like most cell phone battery setups, there is a cell, which holds the power, and a PCM circuit. This Protection Circuit Module protects the battery from over-charging and over-discharging, as well as protecting the rest of the phone from the battery. In our prototype, we are able to use the iPhone’s existing PCM, but we will be continuing to investigate this.