The best battery for galaxy s4 mini is one that can help power the smartphone and keep it powered through the day. With the invention of applications, YouTube, Whatsapp, etc. keeping a full battery or using your cell phone just for the purpose for making calls and sending texts, is next to impossible!
This is why having a replacement battery with you at all times, or replacing the original battery completely are both great and viable options, which don’t cost too much money or time.
Here are some good options for battery for galaxy s4 mini to buy.