Specs are incorrect.
Performance is fake !! When a load of 1.0A is applied as rated, the voltage drops to 4.3V. 8.16V at 0.00A 8.38V at 0.13A 7.42V at 0.49A 4.33V at 1.00A That is, this product does not have an overcurrent protection circuit. It's very dangerous. There is a possibility of fire. Please refund!