The Micro-Batteries are special batteries invented by Krei Tech.
Description[]
Unlike regular batteries, these can hold much more power. They are black with a blue Krei logo imprinted on them.
Only two of them are known to exist.
History[]
After High Voltage were arrested and had their electric orb taken, they broke out and sought another way to get their electric powers back. However, they had also separated and now worked individually.
When Alistair Krei rehearsed for the batteries' presentation, Barb sat silently and saw him, then stole the battery from him. Her daughter, Juniper, soon also appeared and both fought for the battery, until Krei told them there was another one nearby. The villain duo took both and inserted in their wristbands, getting back their abilities.
Later, they went to Richardson Mole's comic-book shop, when they found out that he had bought the orb to put it in a superhero museum which he planned to have built. High Voltage took the orb and got rid of the batteries as they still believed it was a better source, but both were soon stopped by Fred and Go Go. Fred even told them it would've been a better idea to keep them as back-up, so the duo was imprisoned again with no other power.
Gallery[]
| Big Hero 7 |
|---|
    High Voltage fight for the battery.  Krei shows them another battery.   Fred takes the batteries.  |