Toyota is recycling nickel-metal hydride batteries from old hybrids into energy management system, and selling them to Toyota dealerships in Japan. This is part of a broader approach to more sustainable energy use.
The systems can store up to 10 kWh of power. This can be used as backup power, and can also provide power during peak times to reduce overall electricity costs.
It strikes me that this is a really clever way to recycling these batteries. It is simple, and doesn't require batteries to be taken apart for individual components to be recycled, but is instead part a reuse approach.