What is the typical battery voltage used in many RECF VEX-based robots?

• A. 7.2 volts (NiMH rechargeable battery)
• B. 12 volts
• C. 3.7 volts
• D. 5 volts

Answer: (A)

The main idea is that RECF VEX robots are designed to run on a 7.2-volt power source. This comes from a six-cell NiMH rechargeable battery pack, with each cell providing about 1.2 volts. Six cells give 7.2 volts nominal, which powers the brain and the motors effectively during typical operation. A fully charged NiMH pack can be higher (around 8.4V), but under load it settles around the 7V range that the hardware expects. This rechargeable, cost-effective battery is the standard power source used in many RECF VEX setups, making 7.2 volts the typical choice.

Other voltages aren’t the standard for these kits: 12V is beyond what the motor controllers and brain are routinely designed to handle in this system; 3.7V is just a single cell and wouldn’t supply enough power for both the motors and the control electronics; 5V is mainly a logic-level voltage and isn’t used as the main power for the motors in this hardware family.