Battle Mode saw its first light in Just Dance 4. It is a game feature that, just like the name implies, allows players to battle with friends or the computer (as an A.I.) when playing alone. The new feature was seen early in the Just Dance 4 announcement trailer. Battles ceased to return after Just Dance 2014.
In Just Dance 4, there are five different battles. All of them have to be unlocked by collecting Mojo and spinning the prize wheel. (except in the Wii U edition). There are 5 rounds. They are first verse, chorus, second verse, bridge and chorus.
Battle Mode returned in Just Dance 2014. There are four battles in the game. Three of them have to be bought for Mojocoins and one is available in the game from the beginning. Battle Mode is upgraded in Just Dance 2014. The background appears to be the same in general under a cage and there are only three rounds rather than five. When a song wins the entire battle (not just one round), the dancer for it does something bad to the other dancer. For example, when Pound The Alarm wins, the Pound The Alarm dancer will push the Kiss You dancer.
The first sight of Battle Mode during the Just Dance 4 announcement originally had six rounds, Gold Moves, no "HIT!"-sign when one got hit, a different "[song] Wins!" card and Score! (no HP bar). These were, of course, early builds.
The six rounds were the first verse, chorus, second verse, chorus, bridge and final chorus.
The loss of HP in Just Dance 4 is much harsher than in Just Dance 2014.
This is because rounds are longer in Just Dance 4.
