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# Wall Outlet to Car Battery?

Sure use a power inverter

1. Increasing battery life on Linux

You can underclock the CPU with cpupower. e.g. If you want to set the maximum frequency to 1Ghz you can can use cpupower frequency-set -u 1Ghz.

2. How is the battery life on the Samsung Moment?

Depends in the battery you get! Normaly phones are 1-3 days USED ALOT or 3-5days USED NOT ALOT

3. How to determine what battery to use?

The LM317 is a linear regulator, which means the output voltage is always lower than the input voltage. As the 317 is quite old, it's at least 3 V lower than the input voltage.The diagrams say '3-40 V' on the input. That's the rating for the LM317s, not the ratings for the circuits as shown. The 12 V circuit should say '15-40 V' on the input, the 5 V circuit '8-40 V'. Your comment about using two A batteries suggests you were hoping that these were boost converters. It also suggests you are a long way from designing anything starting from components. In which case, although knowing nothing about your loads, you may want to consider this as a starting point. Use a 5 V 'powerbank' as your single 'battery', and the supply to your 5 V load. They are easy to charge (usually from USB), have constant voltage out, and they are protected from all sorts of over- and under- abuse. Buy a 5 V to 12 V boost converter module from one of the online retailers, and use it to power your 12 V load.If this is not suitable, then we need to know more about your loads, application, and other constraints

4. will my amp drain my battery?

It will if your not running your car and the amp is on an running. If your amp is to powerfull for the alternator to keep up with its power draw, then yes it can drain your battery. Solutions are a couple choices, a capacitor, which is a reservoir between the battery and amp, a better battery, or a higher output alternator.

5. How to find out MBA-2011 13" battery serial number on the battery?

To get access to the serial # on the battery you would have to take the MBA apart?If you want to do that here are the instructions.It is easier to use the About This Mac

6. my car battery is dead?

Nissan cars are prone to shorts that cause your car not to start. I've had four of them (I love Maximas and Sentras). Three of them have "died," leaving the battery, even brand new ones, totally drained. There are over 1,000 posts on the internet, all from Nissans. Power from your battery maybe the cause, if it is very old. More likely, you have, after all these years, have a short in your electric system that is draining your battery. Believe it or not, even a bad dome light can totally drain your battery. A short in the alternator is another reason, as well as your starter. To trace it down totally, you will need 2 meters and someone with the time to trace all 34 of your fuses. Do not dispair, as trace #1 may show a burned out fuse that is the cause. Or, it could be that your stereo installation tipped your balance of power, which happens often. Otherwise, it could take 30 traces to do it. Mechanics dislike this method, as it takes so long. And, with your car being over 10 years old, they will probably say, " We can try to find the short, but it could take us 2 to 5 days, or you can just get a new battery and see how long it takes for it to drain." That costs about \$100, where the trace could take several hundred dollars. Most people just get a new battery. I've had to buy seven new batteries. By the way, I went from the Nissan dealership to going to all kinds of automotive repair shops, but none will take the time...overall, it is just cheaper to buy a new battery. Is this problem exclusive to Nissan? Not at all, it happens to all cars over 10 years old. Electrical problems are the main reason old cars get traded in, especially by women owners. No one likes having a dead battery on a dark, lonely night. I am a guy, and it scares me, too, as we have rattlesnakes where I live. And, I still prefer Nissans

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