No, it takes electricity to charge a battery.
Not by heating up the battery directly. In theory, the heat source could be used to make electricity and then use the electricity to charge the battery
ovens produce heat my an electric charge of the battery that contains hot air and makes the oven hot and to heat your food
The battery will attempt to charge the charger since the battery is at a higher voltage than the charger. Thus, the battery will simply discharge and generate heat. If you leave it plugged in long enough, eventually the battery will discharge to a point where it can maintain only 6V, where it will stay until you actually charge the battery.
Some of the energy used to recharge them will heat up the battery (waste heat), if that's what you mean.
The temperature sensor provides feedback to the charger to allow the charger to determine when the battery is fully charged. The battery under charge develops internal heat as it approaches full charge. The temperature sensor measures the heat (temperature) and reports it back to the charger to end the charging cycle.
A PSP battery explodes as a result of excessive heat buildup. This often happens when it has been left to charge for an extended period of time.
Unless it is a rechargeable battery you cannot charge a dry charge battery. If it is rechargeable you need to purchase a charger for that size battery. Automobile batteries are not dry charge.
No the battery don't have a magnetic charge.
how do you charge a vespa battery
A battery charges nothing it accepts a charge from the alternator.
You can not charge a battery in the microwave.
TAKE CARE with a trickle charger as a battery of that type and size will most often be over loaded by a constant charge rate of 2AMPS which is most trickle types. A "Float Mode" charger such as the Schumacher Battery Companion has a max charge rate of 1.5Amps and a peak charge voltage of about 16vdc which prevents heat build up and the high voltage is good for the battery internals without cooking your battery. You can charge the battery from a dead state with one of these and if you forget about it the charger cycles off when the voltage peaks so you don't boil your battery. The relationship between charge amps vs volts and the health of your battery internals is huge which I have not gone into here.