Surge-protection ratings vary by model. Reported values include: 3,540 J; 1,800 J; 1,225 J; 735 J; 490 J; and 245 J. Check the product label or specifications to confirm the joule rating for a specific model.
Most models include a mix of USB-A and USB-C ports. Reported charging arrangements include: USB-A and USB-C sharing a total of 6 A; USB-A at 5V/1A with USB-C at 5V/3A; a shared 20 W total across ports; a shared 12 W (2.4 A) configuration; and some USB-A ports listed up to 5V/4.2A. Always check the product’s spec sheet for exact per-port and combined output limits.
Some models list built-in protections for their USB ports, such as overload protection, overvoltage protection, and overcurrent protection. Not every unit includes all features, so review the product specifications to confirm which protections are provided.
Some devices use an integrated circuit breaker that trips on overload; others include an auto-shutdown feature that cuts power if the unit’s surge-protection capability has expired. Check the product details to see which approach a model uses.
Many designs space outlets apart or place sockets on multiple sides so bulky transformer plugs won’t block neighboring outlets. Look for "rotating" or "spaced" outlet layouts in the product description if you need to fit large adapters.
