What I normally do is take a voltmeter and measure the voltage across the battery posts. When the car is off, the voltage should be around 12V DC. When the car is running the voltage should be just above 14V DC. If it does not change from when it's running to when it's off, the alternator is possibly defective and needs to be replace.
1. 99 Tahoe battery problems
The connections are clean. I have not checked the wires going to the battery, but I will check them and see if there's any kind of corrosion within the insulation. Would a bad connection make my headlights cut off too?
2. Powering NiChrome wire from battery
The issues you are facing are pure Ohm's Law issues.First, the coin cells. They have a high ESR, Equivalent Series Resistance (or Internal Resistance). 20 40 , depending on the load or battery state. Stacking them increases the ESR as well. So from a 3V coin cell like the cr2032 (250 mAh average), and a 8 nichrome wire, we solve for I. I = V / R where R = R-Wire R-ESR.0.108 A = 3 V / (20 8 )And since we know the current through the two resistors (current is the same when in series) and the resistance, we can see how much voltage is actually on each, with more Ohm's Law. V = I * R.2.16 V = 0.108 A * 20 and 0.86 V = 0.108 A * 8 .2.16 Volts of the 3V available, are wasted inside the coin cell. Only V * I = P . 86 V * 0. 108 A = 0. 09 Watts or 90 MilliWatts of Power are going through the Nichrome Wire. Coin Cells are useless in your application.Alkaline Primary Batteries, like your typical AA, C, D and 9V have much lower ESR, and can be considered negligible for this purpose. So pure Ohm's Law applies. 0. 1875 A = 1. 5 V / 8 and 1. 125 A = 9 V / 8 A 1. 5V AA battery, at a sixth of a 9V battery's voltage, with the same load resistance, will produce a sixth of the current. But the Power difference is much greater. In Power, that's 0.28 Watts and 10 Watts. While the ESR of the 9V is negligible, it still exists, at likely
3. Regardless of battery charge, when unplugged Ubuntu displays critical battery message and hibernates
If you want to keep the action (IE: Hibernate) open dconf-editor: org > gnome > settings-daemon > plugins > power and just uncheck: use-time-for-policy, this will force the OS to use the percentage base instead of the ACPI Bios
4. Question mark in battery bar on android?
Your battery has been poorly placed in the phone or you battery is not good, u need to get the battery replaced or, u can try putting the battery back in the phone and restart your phone and see if that solves the problem, and if it does not u need to get a new battery
5. Boat battery question - charging -?
the battery charger will do a better job since no other drain is operating while charging
6. i have a 5 year old battery?
If your car battery is 5 years old, it is time to change it. The normal lifespan of a car battery is 5 years. 6 maybe. Kinda iffy for 6 years. Forget 7. It wo not make it past 6
7. Is it possible to add a laptop battery to a desktop?
As Andy said, get a UPS. A good one will give you 30 minutes of time depending on your usage and type of monitor
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