At our stores, we’ve seen it all when it comes to iPhone repair. Though we typically get a lot of cracked screens through our doors, we’re also familiar with customers who need a new battery for their iPhone. Here are a few tips to make sure that your original investment lasts, before you need a battery replacement. 1. Charge your battery correctly. Most smartphones use a lithium-ion battery, so there’s a special way to keep your battery in good shape before it…