Question about NEC MobilePro P300 Pocket PC

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Exhaust my main battery

If I exhaust my main battery, how long will my data remain before I have to plug into AC power?

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It is estimated that you will have a few days to recharge your battery if the battery is exhausted.

Posted on Sep 15, 2005

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Where is o2 sensor?


It's always in the exhaust, that's what it measures or senses- the remaining oxygen content in the exhaust. So it is somewhere in the exhaust piping, anywhere from where the exhaust leaves the engine, which is the exhaust manifold, to the exhaust pipes leading off from the manifold. If you have a V-6 engine, some manufacturers put an oxygen sensor on each side or "bank" of the engine.
The oxygen sensor is never too far from the engine in the exhaust. Look for an electrical wire or wire set going to a piece sticking out of the exhaust. The main oxygen sensor, or sometimes two sensors, are placed always before the catalytic converter in the exhaust stream. For a different purpose, cars nowadays will also have an oxygen sensor AFTER the catalytic converter but still in the exhaust. The purpose is only to monitor the efficiency of the converter.

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Hello I have a suzuki gs 400 ,timing good compression good new battery carbs have new floats ,needles and diaphragms it idles well but when on the road over 3000 rpm the bike has no power and...


The exhaust system may be the problem. Old mufflers will corrode internally and will sometimes collapse internally. This can restrict the exhaust gasses causing back pressure at the exhaust port. The engine can not get rid of the burned fuel, it can't breathe. Disconnect the exhaust system and go for a quick ride down the street. That should tell the story. The only other things that would cause the problem are bad valves, restricted fuel flow, partially plugged main jets, dirty air cleaner, bad spark plugs, bad ignition points / condenser, and the spark advance not working properly. Babbitt's has all the ignition parts except the spark advance (governor). Please rate my answer. Thanks. www.babbittsonline.com

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1 Answer

Computer was on battery power, warning mess came on pluged in ac right after loss battery power now i get nothing. ac power light is on,but thats all


Remove the main battery from the laptop and plug the power adapter back in, if it powers up the battery needs to be replaced. It is not uncommon to see the battery load down the laptop when it becomes exhausted, if there is no change have the computer checked out.

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The dryer will run for a long priod of time (hours) without shuting off and the clothes remain wet.


The main cause is a plugged exhaust vent in the wall. Try disconnecting the exhaust vent from the wall and run a normal load. If the load dries properly, then you will need to have the exhaust vent professionally cleaned.
Good luck

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1 Answer

IPaq rx3115 working like PC not Pocket PC, need to plugin always


You need to purchase a new removable battery for your RX
The removable batts usually only last about a year (like cell phone batteries).
Although it is showing 100% charge, the battery is not storing enough power to run the ipaq

The rx series uses 2 batteries, one is the removable one u can see/access when u remove the back cover. The other batt is a small round batt which stores the basic info for your system (so you don't lose your data when u swap out the removable battery).

This small (backup) batt is similar to the cmos battery on a laptop or pc.
You cannot easily replace this, as the unit needs to be disassembled to access this batt.
If you are tech-y (and brave), the replacement button batteries are sold on ebay for $9-12

Normally, if your removable batt is bad, you could still use your unit plugged in, and could
remove from AC power without losing data. Not the case if your replaceable batt is exhausted.
When both batteries are bad, you lose everything when u remove unit from AC power.

My workaround without having to disassemble unit:
Purchase and fully charge new removable batt (They have huge capacity ones available for like $15 - better than the original !).
Load up all your programs & settings the way you like.
Perform full backup to SD card (& also on PC via active sync - to be safe)
Now the only time you should lose your data (like hard reset) is if you allow the battery
to completely drain, in which case you can restore your backup.
If you purchase 2 removable batts, you can easily swapout without losing data if you
use the usb charge cable & leave ipaq plugged in while you change battery

Hope this helps






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1 Answer

1997 Honda Civic EX power loss


start with the easy stuff. check the plugs. make sure they are not wet with oil leaking from the spark plug stem seals located on the rocker cover. Check your air filter to make sure its clean. Now for the slightly harder stuff. The spark plug wires should be changed every 80k or so. My suspect the reason for the power loss is most likely a clogged cat convert in the exhaust system. check your exhaust flow. Way to do that is to check the temp. of the exhaust before the cat and the temp. after the cat. If the Cat is plugged the temp before the catalytic converter will be abnormally higher than after the cat.

BUT if you are experiencing misfire of engine. I would go straight to replacing spark plugs and wires. Distributor cap and rotor.

Also check the charging system. make sure the alternator is charging the battery at above 13Volts. With all components on. ( radio/lights/highbeam/AC). Use a voltmeter and check at the battery positive and negative. if its not charging above 13 V replace the alternator.

good luck


Jan 07, 2009 | 1997 Honda Civic

1 Answer

Main Battery Power


It cannot switched the batteries. The backup one is a small internal battery just to keep the CMOS with data. That's it.

If you main battery is not charging or when unplugged won't power on, the is likely the main battery is defective, or the charging circuitry of it is failing.

Best regards,

Jul 01, 2008 | HP iPAQ RX3115 Pocket PC

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