The purpose of this study was to investigate Thais' mobile phone-battery usage and disposal and to examine key psychosocial factor of Thais using different mobile phone-battery disposal methods. The sample consisted of 2, 176 Thai mobile phone users in Bangkok who responded on mobile phone-battery usage questionnaires. Research result revealed that non-student mobile phone users had changed-on average, 2 batteries; and that most people still kept degenerated batteries at home, while others mostly discarded them along with other garbage. Moreover, it was found that mobile phone users who discarded degenerated mobile phone batteries along with other garbage had low intention on, low attitude toward, and low knowledge of, proper mobile phone battery disposal; and had high external motivation on mobile phone battery disposal.
