Old Charger's 'Bump' Mystery Unraveled: Its Crucial Role & Why It Vanished

• The 'bump' on old charger cables is a ferrite bead, designed to filter electrical noise and stabilize current.
• Ferrite beads protect devices from high-frequency signals that can cause damage, slow charging, or freezes.
• They act as a noise cleaner, absorbing unnecessary frequencies to ensure only safe current reaches your gadget.
• Modern smartphone chargers no longer show the external bump because the filtering technology is now integrated internally.
• Ferrite beads are still used in power-brick devices like microwaves, geysers, and laptop power bricks.

Why It Matters: The 'bump' was a vital ferrite bead, now integrated into modern chargers for device protection.