This stage of the competition will see each mentor pitting two of their contestants against each other. They will have to perform the same song in front of the panel of mentors, but it's down to their own mentor to decide which contestant will advance in the competition and who will go home.
Eventually, each coach will be left with just four contestants to represent them in the live shows, where America can vote on who should win the recording contract with Universal Republic.
Team Christina: Tarralyn Ramsey v. Frenchie Davis
First up was Frenchie Davis, a Broadway performer and former American Idol hopeful, and Tarralyn Ramsey, who has shared the stage with Mary J. Blige and Ray Charles and released albums in the past. Christina, who was joined by Sia as her special advisor, chose Beyoncé's hit 'Single Ladies (Put A Ring On It)' as their battle song.
All the coaches agreed that both women performed well, with Adam saying that he forgot it was a singing competition because he'd been having so much fun listening. Blake joked that it was like watching Rocky because Frenchie had the edge at the beginning but then Tarralyn came in at the end and knocked it out.
"As your coach, you took what I said into your performance tonight because you made everybody have fun and that's the one thing I asked you to do," said Christina. "I don't want to pick one!" However, after consulting with Sia, she decided that it was the end of the journey for Tarralyn. "I'm happy you were both able to have fun but I think Frenchie took it tonight."
> The Voice: Frenchie Davis talks Idol, Christina
Team Blake: Patrick Thomas v. Tyler Robinson
Music and economics student Patrick Thomas and 20-year-old Tyler Robinson were the second duet of the night, singing 'Burning Love' by Elvis Presley.
"I do not envy Blake Shelton," admitted host Carson Daly after the battle had concluded. Christina agreed, saying: "I did not expect that but it was your turn to step up and take charge and I think you both did a really good job." Cee Lo also praised both men for being "very surgically, technical great singers", but thought Tyler had the edge. Adam also opted for Tyler, although he described them both as "incredible".
The final decision came down to Blake, who deferred to his advisor Reba before stating his choice. She said both men had "rocked it in vocal abilities, range and looks", adding: "You got a tough decision, Blake." Blake eventually said that while both guys sang well and he appreciated that they both took his advice on board, it would be Patrick advancing.
> The Voice: Jeff Jenkins, Patrick Thomas talk competition
Team Adam: Casey Weston v. Tim Mahoney
High school senior Casey Weston and singer-songwriter Tim Mahoney (who calls himself the "King of Almost") were the only female/male duet of the night. They were both chosen during the second round of blind auditions. Adam, who was joined by Maroon 5's musical director Adam Blackstone as his mentor, chose 'Leather and Lace' by Stevie Nicks and Don Henley as their song.
Blake said that Casey had "interesting" aspects in her voice that he found addictive and said he'd choose her because he sees potential in her as an artist. Christina thought it was a "tough choice" because both artists had great voices that blended well together in the chorus. Cee Lo said that Casey reminded him of a young Stevie Nicks, which, although a compliment, also meant he was more inclined to choose Tim because he is "unique".
Adam said that Tim had really surprised him with his performance and praised Casey for taking on a Stevie Nicks song and nailing it. "I'm so happy with both of you guys, you did an incredible job," he said. "But the winner is Casey. There's just something about Casey Weston."
Team Cee Lo: Vicci Martinez v. Niki Dawson
Soul singer Vicci Martinez (who has already opened for artists including Sting and Annie Lennox) was paired with 19-year-old Niki Dawson for the final duet of the night, which saw them singing 'Perfect' by Pink.
"That was by far the best duet of the night," said Adam, which was a thought echoed by Blake, who predicted Cee Lo would regret pairing the singers together. "It's like when you're watching the Super Bowl and it's coming to the last 20 seconds and it's tied... I'm not saying crap!" Christina loved Niki's passion, especially when she was directing the 'pretty, pretty please' lyrics to Cee Lo, but also liked Vicci's soulful voice.
In the end, after telling Niki that she did an "exceptional job", Cee Lo - who was advised by Monica - opted to advance Vicci in the competition because she had a "war dance" that could tear a whole room apart, adding: "You have a gut wrenching effect on me."
The Voice returns next Tuesday at 10/9c on NBC
> Poll: What did you think of The Voice battles?
> The Voice recap: Meet the teams
> The Voice: Kelsey Rey talks Cee Lo, YouTube