Yes, because with the EPA and with all the systems that you have and the anti-pollution measures that are imposed on the natural gas truck, you have to put a DPF, you have to put a catalytic converter, and you have to put an SCR tank. Once you put all in these things, plus natural gas, you use a lot of electricity. If you're wondering why, it's because we have sensors everywhere to make sure there is no explosion. This is using batteries.