I have a car battery left, and thought they could be used as a "powerbank" for clamping. What do I need for this? Is there something like a "socket" s.den then LED lamp, laptop, etc can connect? And does it work to charge the battery during the day via a solar panel and then have power at night?
Depending on what you have in mind, you need different things. To operate 230V devices you need an inverter. Depending on how many watts the devices need, this can be expensive or cheap. For USB devices or laptops there are also special smaller inverters or converters. They cost almost nothing and are mostly universal devices. Please make sure that whatever you plug in has a deep charging protection and so on that the battery does not break. Or buy a module that has it all. Then you can connect as good as anything and do not have to be afraid.
Recharging. If you're charging at the socket, just charge a charger that can charge the battery. Finished. When solar cell, the whole thing is very complicated again. Since you need again corresponding load controller and so on.
Theoretically already, practically not. To be able to connect laptop etc., you have to "transform" the voltage with an inverter to 230V.
A classic car battery has about 60Ah at 12V, so 720Wh. If you connect now as Ex. 200W (various devices together), the battery would hold arithmetically around the 3,5h. Since the inverter does not work completely lossless, 2.5-3h are more realistic. Whether it is worth the effort and the purchase of an inverter, you have to decide for yourself.
If you also want to recharge the battery, you will of course need a solar panel and a charge controller (also costs a few euro again)
With 12 V can operate a lot. Helpful a voltage converter so that you can charge your phone via the power adapter. This is constantly charged with 5V and does not work with 12V. So too the laptop. Everything very expensive. On the campgrounds there are electricity connections everywhere.
Why expensive? USB charging adapter is there for'n Appel and'n egg That's enough for LED lights (USB), charging from the phone… Since it sometimes does not even need adapters…
Which laptop needs 230 volts? They all have a charging adapter to 12/5 volts
This is not possible with an adapter. To load mobile phone is only 5 V allowed. How do you want to pick up the 12V?
Every USB adapter for the cigarette lighter does that!
These are all voltage transformers from 12 to 5 volts!
And what is in front of the power supply? Right, a 230V plug.
And after the power supply 12 volts come out!
Then it works
Yes, of course… The questioner would have to buy an additional charging cable and cut off the plug or a plug that fits the laptop, cables and then to the battery. Direct loading is probably not, so you would need a charge controller.
Too complicated ♂️
LAPTOP power supplies have almost all 21v. Because a 12v battery is of no use to you. Therefore the detour over 230v
Most laptops have 21V batteries. Therefore it makes more sense to convert the voltage to 230V to use all devices.
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