Wiktionary
vb. 1 (context transitive English) To turn the electrical power on to a device as a precondition to make it operational. 2 (context intransitive English) To become ready for operation as a result of the provision of electrical power.
Wikipedia
POWER UP (the "Professional Organization of Women in Entertainment Reaching Up") is an American non-profit organization and film production company with the stated mission "to promote the visibility and integration of gay women in entertainment, the arts, and all forms of media". It was founded in 2000 by K. Pearson Brown, Stacy Codikow and Amy Shomer. Its members include women and men, gay and straight.
POWER UP provides funding and assistance to filmmakers, as well as producing its own films. After several short films, its first feature film was the comedy Itty Bitty Titty Committee directed by Jamie Babbit. In 2004, POWER UP was awarded the Leadership Award by the National Gay and Lesbian Task Force.
In 2001 K. Pearson Brown, one of the founding members, brought a sexual harassment suit against another founding member, Stacey Codikow. Codikow counter-sued alleging that Brown had made sexual overtures towards her and accusing Brown of defamation. Codikow also demanded Brown's resignation on the grounds that she was bisexual, and Brown later resigned. Both suits were dropped in late 2002.
Usage examples of "power up".
Switching it to VCR, he was surprised to hear the camera power up.
The dark shuttle began to power up its engines and its running lights began to come on.
When he had learned the difference between the created and the born and had discovered that his power was centered at this point in space, he had sucked power up into him through the roots of the mountain and drawn it down in a whirlwind from the heavens, so that he had glowed, dazzling, like a struck lightning rod, and engaged in creation himself.