Keep your smartphone battery as healthy as it can be with the Chargie Efficient Phone Charge Limiter. This compact device ensures your battery charges optimally and shuts off power to your phone when it reaches the percentage you set in its app, so it won’t damage the battery. As a result, your smartphone battery will remain healthier for longer, meaning you can use your phone for longer. With experts recommending to never charge to 100% if possible, it’s perfect for those who charge their smartphones overnight or use their smartphone or tablet for security or surveillance. Using it with the GPS device in your vehicle will avoid overheating because of the constant charging process. In addition to this revolutionary functionality, Chargie also has security features. You can enable Lamp Mode with Proximity Sense and use it on your USB lamp, fan, hard drive, or USB stick. Chargie can shut them down when you step out of range with your smartphone. You can also use multiple Chargies to create a daisy chain when you need more people present to unlock a USB device. Chargie keeps all your devices healthier and more secure for longer.