What is your Galaxy smart phone without a battery? That's right, it's completely useless if it's not working! I don't know about you, but I feel so lost without my phone and disconnected from the world. I feel like I get separation anxiety to be honest, and I should really work on that. But that's beside the point! I think I am just scared to be lost without my GPS and without someone to call. Maybe, I'm just paranoid, but it's better to be safe than sorry. So, my point is, keep an extra charged spare battery with you at all times!! We have spare batteries that are made by Samsung or non-brand aftermarket batteries that work just the same but are less expensive and may have less mAh rating. Milliamp is just a fancy way of saying battery life, so the higher the mAh rating, the more battery life you have! Just a fun factoid, you're welcome!! We also carry portable charging banks. Now this is SUPER convenient and comes in handy and is your best bet in case of emergencies or travel. I think I would probably stock up on 50 of these bad boys just in case of a zombie apocalypse. I think I really need to stop watching all these TV shows. Anyway, they can charge your phone more than once and all you need to do is charge the charging bank separately. That way, whenever your Samsung Galaxy S4 runs out of juice, you can just charge it on these portable charging banks and voila! You're good to go! So I'll leave you alone with these charging banks and batteries for you to get to know each other better. If you want something to double as protection, there are also extended batteries for the Samsung Galaxy S4 Active. These are like a 2 for 1 because you're getting a case AND battery. It works to protect your phone while providing extra battery life without having to pop in a separate spare battery. They tend to make your phone a little thicker, so if you don't like that then you can always go with a power bank or spare battery like I had mentioned before but whatever you choose, just remember you GOT IT FROM A GEEK!