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First check the battery voltage using a multi-meter set to DC and volt range if reading is below 12V battery has probably one dead cell get a new one, if between 12v and 13V battery should be OK to charge. Remove battery undo negative lead first then positive. Please do not use a car charger or any other charging device that has an output greater that 1 Amp you will fry the battery. Charge the battery for as long as possible. Recheck volts across the battery if above 13V refit battery connect positive lead first then negative.
Start your engine, when warmed up check the voltage across the battery terminals it should be well above 13 volts. Increase the revs and watch the meter the voltage should increase to about 14.5 volts. This shows the battery is being charged. Please remember batteries on bikes only last a few years and short rides do not put enough charge in your battery. Buying and using a motorcycle Smart charger does help. I use a CTEK XS 0.8 12V Motorbike Battery Smart Charger & Conditioner. You get a small wiring harness that fits to the battery with a rubber connector that connects to the chargers plug. This unit will help to keep the charge in the battery topped up.
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
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
If your iPhone battery gets low quick, try disabling features within your iPhone which may help increase battery life.
1. Decrease the screen brightness of your phone. 2. Turn off 3G when not in use ( 3G can decrease the battery life greatly ) 3. Turn of Location Services in Settings. ( GPS can decrease bettery life greatly ) 4. Turn off bluetooth. 5. Charge your iPhone up to 80% everytime and then stop charging. ( Studies show that charging up to 80% everytime can help increase the life span of your iPhone battery )
2 hours is enough for a battery to be completely charged...
Once the battery is charged you can remove the power supply and use the laptop till the battery drains up to 10% to 14%......
This will increase the life time of battery... If you keep on charging the battery continuously when using your laptop, then the battery life will be shortened very soon...
So charge and drain the battery properly... This will increase the life time of battery...
Check that the alternator and charging circuit is actually working. You can do this with a voltmeter across the battery terminals. Check the value with the ignition off - you should see 12.1 and 12.5 volts. Then start the engine and leave it on idle - you should see between 13.8 to 14.2 volts. Watch the voltmeter as the gas is pressed down. With the engine revving around 2000 rpm the voltmeter value should increase up to something like 14 to 14.2 V but not increase any further with an increase of engine revs. If you see voltages of 14.5V or above then the voltage regulator needs replacing. Note that if you constantly see voltages of 12V or less with the engine switched off then the battery should be replaced as it will not hold charge and gradually drain down as you are experiencing to a point where it will not turn the car engine. If you don’t see any increase in battery voltage, or the battery voltage falls, when the engine is switched on then either the alternator or the voltage regulator need to be replaced.
Hi Sony battery,
did you mean to say that you battery only remain at 50% and never exceed this amont ??
Normally all the notebook if you keep charging it should come up to 100%, but only a few case that will face the problem
1.problem with battery itself.
2.problem with ac adapter (I face very much problem here not continues power suplly)
3.problem with motherboard the module that deal with charging battery.