In order to charge the Magsafe or Magsafe 2 MacBook, you need to get an adapter.
There are USB-C to Magsafe/Magsafe 2 adapters available, like the one below from eBay:
If you have a MacBook Pro 15"/17", please choose the 85W power version. For the MacBook Air or MacBook Pro 13", select the 60W power version.
In the picture, the HyperJuice battery is connected with the USB-C to Magsafe 85W adapter on the MBP 15" Retina 2012.