What is the best way to charge solar powered garden lanterns quickly?

Solar Powered Lights

I bought a set of solar powered garden lanterns as a surprise gift for my wife. I want her to come into the garden and see them all there lighting the garden path.

The problem is that I have been told it takes 3 days to charge them in sunlight and the surprise is planned for tomorrow night.

Is there a way to quickly charge the solar cells in the garden lights without sunlight?