I had a few devices running Windows Mobile 2003 and later before Android came out, and they were pretty stable and easy on the battery. The later though was pro

I had a few devices running Windows Mobile 2003 and later before Android came out, and they were pretty stable and easy on the battery. The later though was probably due to the lack of 20+ apps, that would constantly try using GPRS. It was mostly Outlook, Opera Mini, a book reader, and a RSS client.