Efficacy is different from electricity consumption.
1. Efficacy. The 4000w magnetic slimmer can release an effect equal to its own power and has great power, while the 2300w magnetic slimmer can also release an effect equal to its own power.
2. Electricity consumption. The 4000w magnetic battery can use 4 kilowatt hours of electricity per hour, while the 2300w magnetic battery only uses 2.3 kilowatt hours of electricity per hour.