Tip & How-To about Dell Latitude D600 Notebook

Make your laptop last longer on the go.

Replace the CD drive with an additional battery pack, it should give another 4 hours approxomatly. Great for long train rides with no power supply.

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which two connections supply the power from the battery


Hi Ray,

In a computer, nothing connects directly to the battery, as the battery is not what powers the system. The battery controls the CMOS settings, which involves all of the things that come up before windows loads when you turn on your computer.

As for how the computer actually gets the power, there's a box in there called a power supply, which receives its power from the 3 pronged plug you put into the back of it. The Power Supply gives power to the computer through a series of different wires.

There are a bunch of 4 pin molex connectors, that go from the PSU (power supply unit) to the various drives throughout the machine. In addition, it supplies power to the motherboard itself via a 20 or 24 pin connector, that goes straight into the board. Some have an additional 4 pin one as well to supply power to the processor.

If you were looking for something else, feel free to leave a comment.

Hope this helps :)

Nov 29, 2009 | Packard Bell Computers & Internet

3 Answers

Ebike in need of more power by adding batteries..


A 250W electric motor will only pull about 5.1 amps at 48V. The lead acid batteries that come with the bike are more than capable of 5A of output without dropping voltage. Therefore, wiring a second pack in parallel will not do anything to increase the available torque or power from the motor. All it will do is increase the time/distance you can ride the bike on a single charge.

Also, you should take care that wiring lead acid batteries in parallel is not always safe, especially if you are wiring newer batteries in parallel with older batteries. A common failure mode is for one of the cells (there are several in each battery) to short circuit. For a series-wired pack, this only decreases the voltage, but if you have two packs in parallel, you'll end up with one pack having a lower voltage than the other, and it will draw tremendous current out of the other pack, possibly causing an explosion and great bodily harm.

If the performance changed suddenly after hitting a bump, then you probably broke something in the hub. If the motor has multiple windings, it's possible one of them became disconnected from the power source. This would decrease the available torque and power. I would look into having it repaired.

Be careful, and ride safely.

Nov 07, 2009 | Electric Bicycle Motor, Bike,electric...

1 Answer

i have a pentax optio 50l and when i turn on the screen just says lens error what can i do?


Usually "lens error" means that the lens can't be telescoped out, and it's not a good sign. You'll probably need to send the unit to tech repair.

If the unit does not make any noise at all, it could just be a loose motor connector (but it could just as well be a fritzed motherboard or a dead coil in the motor - which would require a unit replacement).

It could also mean that the internal electronics got stunned or the battery pack hasn't enough juice. So, before trying anything else, get a fully powered battery pack (or external power supply) and retry after leaving the camera "cold" with no battery for a couple of minutes.

If possible, try getting a battery with a slight overvoltage (e.g., replace rechargeable batteries with nonrechargeable ones, just this once).

If there is a grinding noise reminding of plastic cobs snapping together, that's probably exactly what it sounds like - the drive train of the lens broke, and again you'll have to get it replaced.

A very short grinding noise, immediately aborted, could mean you get incredibly lucky - there's a grain of sand or something like that in the telescope, and is wedged hard enough to immediately stop operations before the drive train gets damaged. Try looking with a strong light between the "rings" that make up the telescoping lens, and inspect the outside of the rings (if possible) for scratches. If the obstacle is visible you might be able to dislodge it with a hard plastic sheet (those used in OHP) used edgewise. Also try blowing air in the ring gaps.

You could also try to "help" the drive train by GENTLY pulling on the lens and pressing the power button, or keep the shutter button pressed while powering on (this should run the autofocus retraining and lens extension together).

This happened to me often on Casio cameras which are really good, but have the "rings" not packed close together enough, so that unless you keep them with great care, dirt will find a way to wedge in.

Oct 22, 2009 | Pentax Optio 50L Digital Camera

2 Answers

Laptop will not operate or charge the battery from the power pack. It runs fine on battery.???? It is an NEC Versa M400


1. Power OFF laptop
2. Remove battery
3. Use power pack and turn ON laptop (without battery)
4. The laptop will work.
5. After Windows has settled down, insert battery (with laptop on and Windows running).
6. Allow the power pack to catch up a couple of hours.
7. It will work now...

Sep 25, 2009 | NEC Versa VX Notebook

2 Answers

Laptop will not power on at all.


Don't know what you have for a laptop, so will have to give you a generic process, here. Power down. Remove hard drive, remove cd reader and/or floppy drive. Remove memory cards. Replace only 1 memory card in the main slot (probably marked as slot 1). Try to power it back up and let us know what happens.
Thanks!
Ron-

Nov 02, 2007 | Computers & Internet

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