SONY VAIO VGN-FW490JBB battery charge problem

[majid_tech]

Hi -i cant write english propertly please excuse me -charge indicator of the laptop is on and charge rate is 20,520mw But the battery is not charging over 46% .

please help

 

[kam1787]

How old is the battery?
What's the voltage on the battery - both measured and rated?

 

[burt007]

Hi -i cant write english propertly please excuse me -charge indicator of the laptop is on and charge rate is 20,520mw But the battery is not charging over 46% .

please help

Also check the contacts and output voltage of the charging adaptor it should be considerable higher than the battery voltage I.e. about 5 volts.

 

[kam1787]

Also check the contacts

for sure, over time the contacts can oxidize - clean with an eraser or brillo pad or such or if really bad with a knife [use caution!]!

 

[majid_tech]

hi - thank you for answer --- Battery has been working for four years - i clean battery connector but Did not result

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The battery is charged to 46% After 46% charge rate is 20.520mw and but battery is not charging over 46%

If disconnect and reconnect the charger to the laptop , battery is charging to 47%


voltage on the battery about 12Volt

 

[kam1787]

After 4 years, it is probably the battery that needs replacement.

 

[burt007]

After 4 years, it is probably the battery that needs replacement.

I agree battery usually have about 5 years of life of so many times you can charge and discharge, but still it shows that it is chraging to 46% puzzles me. But if you can get hold of new bettery you will know for sure if it is the battery that is indeed at fault. Take it to the computer repair shop and see if they have one that they can try out.

 

[kam1787]

it shows that it is chraging to 46% puzzles me.

I suspect the battery can only charge to a point - below what it could before.

Still it could be the charging circuit, or even the monitoring circuit or app.

My bet is the battery.

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voltage on the battery about 12Volt

You measured the battery out of the computer? But did you place a load across it? You need to have a load across it to get a truer voltage. Try placing a 47 to 100 ohm resistor [say 5 watts] across the contacts.

 

[majid_tech]

thank you my friend for help me - after replace battery charger circuit Mosfet, The problem was solved and battery charged to 100%