Question about Toshiba e800 Pocket PC

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Battery not charging

I fully charged the PDA the night before, and when I tried to turn it on, a few hours after disconnecting from current, nothing happened. It would not even turn on for a second telling me it had low battery. When I returned home I connected it to the power and it turned on, but with a hard reset. I let it connected to power for around 3 hours and then began installing software, disconnecting it from the power and connecting to the PC. Immediately it showed the low battery warning, and when I went to see battery status, it was at 18%. Since then I tried again charging, all night this time, but again when I tried to turn it on battery was at 18%. Is there any other test I can try? Any suggestions?

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In my opinion everything you done was right. I believe that the warranty is still valid and you should try to contact service partner. Maybe is the power charging electronic defective. Sorry but I don’t see any other possibility that you can do alone.

Posted on Sep 08, 2005

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1 Answer

Chaging batter


The voltmeter test provides a general indicatorof battery condition. Check the voltage of the battery to verify that it is in a 100% fully charged condition. If the open circuit (disconnected) voltage reading is below 12.6V, charge the battery and then recheck the voltage after the battery has set for one to two hours. If the voltage reading is 12.8V or above, perform the load test described below.



The load test measures battery performance under full current load and is the best indicator of battery condition. Load testing a battery tat is not FULLY CHARGED i.e. at 12.8 VDC can permanently damage it. Fully charge it first and then let it stand for at least an hour before the load test is done. You also need a load tester. AND you should know how to perform a load test. Often the best way to load test a battery will be to take it to a battery shop and have it done there.



VOLTAGE (OCV) STATE OF CHARGE FOR AGM BATTERIES IS:

12.8 VDC = 100%

12.6 VDC = 75%

12.3 VDC = 50%

12.0 VDC = 25%

11.8 VDC = 0%



COLD CRANKING AMPERAGE (CCA) for an XLH battery is 270













19 AMP HOUR BATTERY =



BATTERY STATE OF CHARGE = 12.8 VDC = 100% Charge; Rate of Charge = N/A



BATTERY STATE OF CHARGE = 12.6 VDC = 75% Charge; Rate of Charge @ 3 AMP = 1.75 hours @ 6 AMP = 50 minutes @ 10 AMP = 30 minutes @ 20 AMP = 15 minutes



BATTERY STATE OF CHARGE = 12.3 VDC = 50% Charge; Rate of Charge @ 3 AMP = 3.5 hours @ 6 AMP = 1.75 hours @!10 AMP = 1 hour @ 20 AMP = 30 minutes



BATTERY STATE OF CHARGE = 12.0 VDC = 25% Charge; Rate of Charge @ 3 AMP = 5 hours @ 6 AMP = 2.5 hours @ 10 AMP = 1.5 hours @ 20 AMP = 45 minutes



BATTERY STATE OF CHARGE = 11.8 VDC = 0% Charge; Rate of Charge @ 3 AMP = 6 hours, 40 minutes @ 6 AMP = 3 hours, 20 minutes @ 10 AMP = 2 hours @ 20 AMP = 1 hour





The figures listed above assume that the battery is charging at room temperature. If warmer than room temperature, use a slightly shorter charging time. If colder, use a slightly longer charging time.



The use of constant current chargers to charge maintenance-free batteries is not recommended. Any overcharge

will cause dry-out and premature battery failure. If a constant current charger is the only type available, do not exceed the charge times listed above and do not continue charging the battery if it gets hot. When charging, never exceed 15 volts for more than 30 minutes.



If the battery gets hotter than 110 degrees F. (43 degrees C) during charging, discontinue charger and allow the battery to cool. Overheating may result in plate distortion, internal shorting, dry out and/or other damage.



COLD CRANKING AMPERAGE (CCA) for a 2001 XLH battery is 270

Apr 22, 2014 | Harley Davidson XL 1200 S Sportster Sport...

1 Answer

Battery fully charged, bike turned on after, but on 2nd try after couple of hours, no power


Based on what you've said here I would say that either the battery is incapable of maintaining a charge or something is draining the battery. To test to see if something is draining it, disconnect the positive cable and put an ameter between the cable and the battery to see what current is being 'used' when the ignition switch is off. It should read ZERO amps. If there is current flowing then something is draining the battery - pull fuses to find the culprit. If the drain shows ZERO amps then it's possible the battery is tired and needs to be replaced. Motorcycle batteries don't usually last more than a few years.

I hope this helped. Sorry for any typos.

Scott

Nov 15, 2011 | Motorcycles

1 Answer

I have a scootamart large scooter,not sure if 6 or 8 mph.batteries have been checked and are perfect but can only travel 5 or 6 miles on a full charge.what can be wrong.


Hi. How many amp/hours are your batteries?
Who tested your batteries, and how did they test them.
I have had batteries tested by an auto electrical technician, who said the batteries were OK. I knew at the time that the batteries were faulty.
What he did was do a short high current test, that he would normally do on a car battery.
To test batteries in a scooter you have to do a constant current test on fully charged batteries, and monitor the battery voltage. When the battery voltage drops to 10.5 volts across the 12 volt battery, that is considered a flat battery. Take the time elapsed for the test, and you can roughly work out the amp/hour rating of your batteries.
The amp/hour rating of a battery is worked out on a 10 or 20 discharge. A 40 amp/hour battery can supply 2 amps/ hour for 20 hours.
If you take 20 amps per hour, you will not get 2 hours of use. You will probably only get 1.5 to 1.75 hours of use. The more current ( amps ) you take out of a battery, the less amp/hours it will supply.
The best way to test your batteries is a constant current test, but they take a few hours, or try new batteries.

Also how long do you charge your batteries for. Most chargers need to be on at least over night to fully charge your batteries.
Some chargers have a green LED that comes on when the batteries are nearly full. This green LED is a guide only, and most batteries still need a few more hours to do a full charge.
Good luck. Neil.

Jun 10, 2010 | Health & Beauty

1 Answer

I was able to charge it fully last night but now it will not turn on this morning.It is a sansa clip i have tried holding the power up for a few minutes but still nothing.


I'm surprised it wouldn't turn on when plugged into external power. That would mean a different problem than a disconnected battery lead ... possibly a disconnected USB port lead, though then I would have expected that you'd be able to turn it on when not plugged in.

Feb 19, 2010 | SanDisk Sansa Clip MP3 Player

2 Answers

Craig 4gb mp3 model cmp616f does nothing but blink hour glass


left craig mp3/video player model cmp616f on while disconnected from computer over night. connected to computer next day seen hour glaas 2 or 3 seconds then craig blue screen . it connected to computer and stated charging again seems to have reset its noon now dec 28 2009 ill post again results when fully charged and try to use.

Dec 28, 2009 | Craig CMP168C MP3 Player

1 Answer

All of a sudden it will not turn on....nothing...when plugged into the usb...it say fully charged....but if you disconnect..and try to turn it on.....nothing happens..


If you can turn your player on while being plugged to your PC/Laptop or USB charger, then your internal Lion battery is most likely gone past its useful life (some 500 charges or 18 months usage) and may need replacing. Most MP3 player may show 'fully charged' when plugged in either when the battery is truly fully charge or defective battery is no longer taking a charge: e.g. minimum or no current flow situation.

Dec 20, 2009 | RCA M4204 MP3 Player

1 Answer

My motorola krzr only stays on for a few minutes after a full charge.


Yes, you should resort to a new battery, coz the old one is exhausted. Overnight charging is not a good habit. You should charge 2-3 hours until full, and remove the charger

Sep 27, 2008 | Motorola Mobility MOTOKRZR K1 Cellular...

1 Answer

Zire72's on the fritz!


Plug the ac wall adapter to charge the PDA and leave it there.

When the PDA exhausted the battery charge, it needs minimum 30 minutes to charge to the minimum level to have the PDA powering on.

Once it powers on, leave it charging the battery until is fully charged (3-4 hours).

Best regards,

Sep 02, 2008 | Palm Zire 72 Special Edition Handheld

1 Answer

LG VX5400 cell phone power problem


try replacing your battery

Jul 29, 2008 | Cell Phones

3 Answers

PDA would not turn on...


try to charge it for longer time, then try to turn it on, i'm not sure that its gonna work.

Jul 24, 2007 | Dell Axim X51v Pocket PC

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