Question

1. the batteries most used in electric cars these days are this type:
2. the new batteries that our vex robots will use are this type:
3. the type of battery used in a gasoline car (starter battery) is this type:
4. what kind of energy is stored in a battery?
5. what is the biggest risk when using a lithium ion battery?

Explanation:

1. Lithium - ion batteries are commonly used in electric cars due to their high energy - density and long cycle life.
2. VEX robots may use rechargeable batteries like lithium - polymer (Li - Po) batteries for their compact size and high power output.
3. Lead - acid batteries are typically used as starter batteries in gasoline cars because they can provide high current for a short time.
4. Batteries store chemical energy which can be converted to electrical energy through electrochemical reactions.
5. The biggest risk with lithium - ion batteries is thermal runaway, which can lead to fires or explosions if the battery is damaged, over - charged, or over - heated.

Answer:

1. Lithium - ion batteries
2. Lithium - polymer (Li - Po) batteries (common choice)
3. Lead - acid batteries
4. Chemical energy
5. Thermal runaway