For the first time Apple has launched two new models of iPhone at the same time, which has managed to double the amount of teardown work iFixit needs to carry out. But they managed it somehow. We’ve already discussed the internals of the iPhone 5S and all that glue Apple used to keep the battery in place, but what about the iPhone 5C?Well, it turns out to be a similar story, albeit with components taken from last generation’s iPhone 5. The biggest change we see in the iPhone 5C specs is the switch to a plastic casing, plastic buttons, and slight changes to the speaker and microphone hardware.That move to plastic has also meant increased handset weight, at least compared to its more expensive brother, the 5S. The plastic casing on the 5C is incredibly tough and cannot be easily bent, which is positive, but it weighs 43.8 grams on its own. For comparison, the aluminum iPhone 5S‘ metal casing weighs just 25.9 grams. iFixit speculates the extra weight is required in order to achieve the overall strength. Apple certainly doesn’t want the 5C cracking in your pocket or after a slight drop, thus completely defeating the purpose of moving to the plastic housing.Inside the 5C, Apple has yet again used a lot of adhesive but it’s actually a worse situation than the 5S. The same two strips of adhesive are found behind the battery, and will require heat and prying to get unstuck, but Apple has also decided to glue the antenna connectors in place. Glue is messy, makes it easy to break things, and therefore makes the device less repairable.Other than that, the only real change seems to be the battery size increasing slightly from the 1440mAh unit in the iPhone 5 to a 1510mAh unit in the 5C. Sure that’s bigger, but still less than the 1560mAh battery in the 5S. It seems strange not to use the same battery size across both the 5S and 5C from a production standpoint, but changes to the casing might have made this unavoidable. So if you’re seeing iOS 7 battery issues it’s possible that it’s simply because the 5C has less battery capacity than the 5S but, to be fair, we don’t know about the relative battery drain of the 5C’s A6 processor versus that of the 5S’ hot new A7.Just like the iPhone 5S, iFixit awarded the 5C a 6 out of 10 repairability rating. Again, that’s mainly due to the use of glue making the battery harder to replace, the glue on the connectors, and the glass, digitizer, and LCD being a single unit making it an expensive component to switch out.So if you plan on picking up an iPhone 5C it’s going to be tough to repair yourself, but it’s a very strong device so maybe you won’t have to.