A mobile battery pack is a lifesaver on days when you can’t charge your devices. That is if you remember to bring it. Elgato has a solution for that with its 6000mAh Smart Power battery. It comes with Bluetooth and an iOS app to access your calendar and remind you to bring it on long busy days or on vacation. It can also let you monitor how much juice it has left and it can trigger an alarm if you can’t remember where you placed the battery pack. It can even remind you to charge the battery.