Similar to battery cases from Mophie and Incipio, the $60 (£90 and AU$136) OtterBox Resurgence Power Case is a power pack that slips over your phone in an extra-large case. In addition to the battery reserves, it protects your phone from drops and scrapes, giving you extra peace of mind throughout the day.
The case features the battery charger, which you slide your device in to charge, and a thick bumper that goes all around the edges of the phone. Putting the case on and taking it off does require some muscle. When I put it on my phone, I had to press around the edges, snapping each side into place to make sure it was securely attached.
To take it off, I start by prying the top of the rim off, and the rest of the rim comes off. This takes some wrangling, and sometimes I had to pull so hard I thought I would break it. I'm sure this all helps keep the case snug and securely on the phone, but I don't really want to wrestle with this thing every time to take it off and put it on.
Its indicator light, which tells you the case's battery levels, encircles the power button on the back. These lights are hard to view outdoors in direct sunlight. Whenever I wanted to check my charge, I had to shade it with my hand in order to see if they turned on.
With this extra bulk, the case is going to add more weight and mass to your device too, necessitating a headphone extender (an unseemly but common requirement with these types of phone cases). I dropped the accessory with the phone inside on a cement surface several times (yes, on purpose), and the handset survived unscathed. There were times, however, when the rim would pop off after I dropped it, but it never broke apart -- I just had to snap it in place again. Of course, it'd be more reassuring if the accessory remained a solid piece after every tumble, but since it did well to protect the phone each time, taking the time to make to snap the case together again was a small price to pay than, say, a brand-new iPhone.