I am looking for a thermoelectric generator that can power a device with an average power consumption of 90 mW at 3V. Specifically, I am looking for one that can turn human body heat into electricity. The device would be worn around the wrist or ankle of an adult or child. Size is very important: the smaller, the better.
Currently, I know of Peltier tiles and chips made by the companies Micropelt - http://www.micropelt.com/products/thermogenerator.php and Perpetua Power - http://www.perpetuapower.com/technology.htm
Please look into these 3 options and see how viable they are. I would like to find other sources of this technology as well. There may be companies overseas (China) that have readily available products.
I need to know the sizes and prices (small orders and bulk) of the generators, how to order them and if the company can help me integrate them into my design. I also need to ensure that the generators do not contain any potentially harmful components.
While a lot of this research can be done online, you will most likely need to contact some of the companies to get the information that you need.