The world is full of inexpensive USB charging adapters. Since the adapters connect to AC mains power, a very large amount of energy is available that can result in damage to the device or even the home / office the charger is in under catastrophic failure. Since nearly every person in the world needs multiple USB charge adapters, the manufacturers compete aggressively on size and price. This leads the OEMs to be tempted to cut back on safety and interfere-reducing components.
Ethical and responsible manufacturers find a way to keep the quality and safety circuitry intact, and may even go beyond the chip manufacturer and safety regulator requirements. These extra measures help protect the charger brand image. A distinct retailer known for quality USB charger adapters is IKEA. It’s speculated that since they’re putting their own brand on the charger, IKEA is perhaps taking notable care to ensure the chargers don’t damage devices or the surroundings.