You cant.
Such conversions are often inefficient and/or expensive. It requires an external power supply or battery charger to convert AC into DC.
To convert a 240V grinder to 12V, you'll need to replace the motor with a compatible 12V motor, as simply reducing the voltage won't work. Additionally, use a suitable power supply or battery that provides 12V and the necessary current for the motor. Ensure that all components are rated for the lower voltage and properly wired to avoid damage or safety hazards. This process may require custom mounting or modifications to the grinder housing.
it need a continuous 12volt power supply for the memory
A UPS (uninterruptible power supply) contains a battery, and an inverter (a device to convert the battery power to AC line current, for running devices that plug into the wall). Or a laptop with a working battery.
depends on the kind of battery. a regular battery (aa,aaa,d,c) should supply 1.5 volts. a car battery should supply 12 volts
They are absorption type fridges( not compressor driven). They work by boiling the working fluid by heat. Electricity supply can be from mains voltage reduced by transformer to 12v AC. 12volt DC car battery or from small flame from bottled gas. Usually for caravans,trailers,winnebago's
They could be run in parallel from a 12 v 1.5 amp power supply.
If your battery is dead and you connect the power supply with your battery installed, the battery will automatically start charging. If you wish to run your MacBook off your power supply only, simply remove your battery from your MacBook and connect the power supply. You will then be running solely on the power supply. If you battery becomes fully charged while your power supply is connected, you MacBook will switch to the power connector as it's power source - preserving the battery.
You need a 12volt dc power supply. Be aware that these get very expensive if you need more than 10 amps.
battery
In an uninterrupted power supply there has to be a source of power when the electrical utility is not there. The only supply that is available is a battery that is in or connected to the UPS.
Yes, a 12-volt 6-amp charger can be used to charge a 12-volt 18Ah battery, as long as the charger is compatible with the battery type (e.g., lead-acid, AGM, etc.). The 6-amp rating indicates the current the charger can supply, which is appropriate for charging an 18Ah battery, allowing it to charge more quickly without exceeding the battery's capacity. However, it's essential to monitor the charging process to avoid overcharging, and using a charger with an automatic shut-off or float mode is recommended for safety and battery longevity.