Controller battery vs brain battery

VEX V5 General Discussion General Forum
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Just a simple question. We all know that the EXP/V5 battery (for the brain) and V5 controller battery are the same Lithium ion types. The same for the IQ battery and IQ controller.

What I’m wondering about is why the battery for the brain drains faster than the brain for the controller if both are connected for the same length of time and use? The product website for each of these say that one charge for the controller (regardless if its IQ/V5/EXP) lasts for months. However, one charge on the battery for the brain drains in 2.5 hours.

I’m sure its a simple explanation, but the physics/electrical engineering part is not my forte, so I wanted to get a fuller understanding of this.

TIA!

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The brain has a lot more tasks to do. The controller just has to interpret and emit signals from itself. The brain has to do that, power motors, power sensors, pneumatic actuators, and take all that information and interpret it.

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