When you select a regular phone case, you make all sorts of trade-offs. If you want to preserve the look of your iPhone, then you’re stuck using very thin cases which offer less protection. If you want to protect your iPhone against a hard fall on a ceramic tile floor, or a plunge into your swimming pool, you’re stuck slapping a bulky case on it.
Selecting a battery case is exactly the same: you’ll make trade-offs based on the features that are the most important to you. Let’s run through battery-case specific features you’ll want to weigh when making your case purchase.