A CMOS battery--short for complementary metal oxide semiconductor--is necessary to retain your computer's hardware settings. Symptoms of a dying CMOS battery include system warnings, lost time settings, and sometimes even unexpected shutdowns. Once you've recognized the symptoms, you can check the battery itself.
A non-governmental organization (NGO) is a citizen-based association that operates independently of government, usually to deliver resources or serve some social or political purpose.
The terms NPO and NGO (non-government organization) are also often used interchangeably but they are different. NGOs are separate from government and require no government council but depend on the government for funding. However, most NGOs are also non-profit organizations.