This isn't as big of an issue in automotive applications, where at least some level of extra power is available in most vehicles, but it is huge for phones, MP3 players, and other mobile devices.
Nke a abughi dị ka nnukwu ihe n'ikike ngwa ngwa, ebe ọ dịkarịa ala, ike dịkwuo n'ọtụtụ ụgbọ ala, ma ọ bụ nnukwu ihe maka igwe, egwuregwu MP3, na ngwaọrụ ndị ọzọ na-eji agagharị agagharị.