Looking for battery operated heated bird bath

I'm hoping that someone can point me in the right direction. I'm looking for a heated bath, but I do NOT have an outside outlet to plug it in. ( I think that when the house was added onto by the previous owner, they neglected to add any power outlets int he back.) I either need a battery operated one, or a solar powered bath that can be supplemented with battery power since the area that I am looking to put it doesn't have sunshine all the time. I even considered just getting a water wiggler, but I don't think that will stop ice from forming when it is freezing at night.

Right now, my bath is just one giant ice cube. I'm open to any suggestions.
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Hi penne, I haven't had any luck finding battery powered but their are solar ones.

I haven't heard many good reviews on them especially considering that there isn't alot of sun in the winter season.

Hope someone else can chime in with more help.

Thanks Pelletory. I'm going to keep looking. Whenever we get around to expanding our house, we will definitely include outlets!