Charge is the second resource in the game by importance. To start spending charge, you have to get a headset first. Each unit of charge used while running takes some of the headset's durability. In return you get KCAL tokens, the headset rank is then accrued and the chance of receiving a chest increases.
One unit of charge equals approximately one minute of activity.
Every unit of charge restores separately. The full recovery takes 24 hours. The pool of charge after the registration is going to be filled after 24 hours.
The bonus charge is here to give you even more energy! It is now possible to receive more bonuses: when running with both a sneaker and a headset you can receive an additional chest.
The rarer the headset on the shelf, the more energy bonus it gives.
So that you know, the bonus charge is spent only when the main energy supply is drained. The amount of bonus charge you can spend right away is 10% of the main charge, i.e. if your main supply is 100 units, the amount of bonus charge is limited to 10.
Also, headsets can use only the charge and the bonus charge, so your energy pool, which belongs to your sneaker, will not be used.
Is there an energy limit?
There is, but it's part of your journey to find out where exactly.