Power Band

The Power Band are special bands that Ochobot gave to BoBoiBoy, Ying, Yaya and Gopal, and Fang to indicate that they have powers. If they don't wear it, they will lost their own powers.

BoBoiBoy
The image on his band changes when splitting himself and using different elements.

Powers: (Thunder -Lightning, Wind-Cyclone and Earth-Earthquake), and Elemental Spilit.

In Season 1 he has two Power Bands. While in Season 2 he has only one Power Band

Fang
Fang got his power from Ochobot. When Adu Du and Probe try to snatch Ochobot to get power, he give Fang the power band and get Power of Shadow. When Adu Du and Probe try to attack him, he reply it by casting Shadow Dragon. But, he can't control it. That's why Ochobot sacrifice himself and finally fainted with Fang.

Powers: Shadow Manipulation

Yaya
Ochobot gave the band to her to free BoBoiBoy from getting squeeze by Super Probe.

Powers: Gravity Manipulation

Ying
Ochobot gave the band to Ying so she could distract Super Probe and Adu Du from shooting Yaya.

Powers : Time Manipulation

Gopal
The last character that Ochobot gave powers, but then Ochobot forgots what is Gopal's powers. They only known what Gopal's power is that when the time they we're kidnap by Adu Du.

Powers: Food Manipulation

note: Gopal's power band is also a watch (Episode 31).

Episode 38/39
Ejo Jo captured Gopal, Ying and Yaya and removed their power bands/watch, which means that they lost their powers forever.

Trivia

 * When BoBoiBoy is only one, the image on his power band is Thunder.