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  • Batteries are like lunchboxes for robots — they store energy! ⚡ Without power, a robot can’t move or think. Let’s learn how robots get and use this energy.

    • 🧃 Energy Source in Robotics

      Robots need electricity to work — and that comes from energy sources like batteries or power banks.

      🔋 Common Battery Types

      • AA/AAA: Simple, cheap, used in toys and basic circuits.
      • 9V: Compact, great for mini projects.
      • Li-ion / Li-Po: Rechargeable, powerful — used in drones and advanced robots.
      • Power Bank: USB-powered, great for Arduino or Raspberry Pi robots.

      ⚠️ Tip: Never mix old and new batteries — it can cause leaks or failure.

      🧠 Why Use Rechargeables? Save money, reduce waste, and even charge with solar panels!

    • 🪛 How Batteries Connect in Robots

      Batteries connect using:

      • Battery holders – keep them secure
      • Jumper wires – pass power to the circuit
      • Switches – turn power on/off

      ✅ Always check:

      • Voltage matches the robot's need
      • Polarity – positive (+) and negative (–) sides

      🎯 Tip: Wrong connection can damage your robot!

    • ⚖️ Choosing the Right Battery

      Think about:

      • Voltage – match what your robot needs (like 3.3V, 5V, etc.)
      • mAh – more mAh = longer use time
      • Size & Weight – small robots need light batteries
      • Rechargeable? – saves money and waste

      🔌 Fun Fact: Some insect-size robots run on tiny coin cells and can fly or crawl!

      🌿 Some nature-inspired robots even use sunlight or body heat to recharge!

      🧪 Try This: Battery Power Test

      Use a small motor and two battery types. Observe:

      • Which one spins the motor faster?
      • Which one lasts longer?

      🧯 Battery Safety Tips

      • Never short battery ends – it can get hot!
      • Store in dry places
      • Recycle old batteries safely
      • ⚠️ Never charge non-rechargeables