Portable rechargeable batteries greatly simplify life, prolonging the work of the gadget with a depleted battery at a time when it is not possible to charge it from the outlet. But once at home, you have to charge all the equipment at once, so that next time you will be prepared again, for example, during long trips. The only question is whether there are enough outlets to simultaneously restore the charge on all devices. Slimger PRO can greatly facilitate this process. The presented portable charger uses magnetic charging technology, which allows you to charge multiple Slimger PRO instances at once. To do this, just put them on top of each other. Only one Slimger PRO is charged via a micro-USB connector, while being the base for charging all the others. Up to 8 devices can be charged simultaneously. The power of one battery is 3000 mAh, this is enough for 100% recovery of the charge of an average smartphone. To connect mobile devices, there is a built-in Lightning cable for iOS and micro-USB for Android. Slimger PRO is close to a business card in size and is about 0.7 cm thick. As part of the fundraising campaign for Idiegogo, the cost of a single battery is $ 30.