abi>>forums

abi>>forums (http://www.anythingbutipod.com/forum/index.php)
-   Cowon J3 (http://www.anythingbutipod.com/forum/forumdisplay.php?f=225)
-   -   Cowon J3 battery problem - please help! (http://www.anythingbutipod.com/forum/showthread.php?t=68295)

Pipps 02-27-2012 01:28 PM

Cowon J3 battery problem - please help!
 
I received my new J3 today. I have no reason to think that it is anything other than brand new, as the retail packaging seemed unopened and the factory screen protector film was mint.

I charged it for the recommended 3.5 hours this afternoon, as per the user manual. In fact, I charged it for 5 hours. I knew it was charging because the icon appeared on screen and the I was using a reliable USB charger plug.

Immediately upon disconnecting the J3 from the charger, I then begin using it for the first time.

But within 10 minutes, I was told that the battery was low and the unit then switched itself off automatically. It did this several times consecutively until it then refused too switch on.

Incidentally, when is turn the J3 on the battery icon at the top displays that it is full. Within 30 seconds the icon then changes to empty.

What on earth could be the problem with this brand new J3?

musichound 02-27-2012 01:33 PM

Seems to be it's battery related. When you plugged in the USB cable, did you make sure it was inserted correctly? There are known instances where people think the cable is plugged in properly, only to find out that extra force is needed for a proper insert.

Pipps 02-27-2012 01:37 PM

Good point - I did encounter that stiff connection problem with the proprietary USB cable. But I overcame it and made sure it was firmly connected. Thanks for the suggestion though.

Any other ideas?

musichound 02-27-2012 02:30 PM

Quote:

Originally Posted by Pipps (Post 600817)
Good point - I did encounter that stiff connection problem with the proprietary USB cable. But I overcame it and made sure it was firmly connected. Thanks for the suggestion though.

Any other ideas?

The only other thing I can think of is that maybe it needs to be charged/discharged several times for proper operation. Other than that, it's most probably a bad battery.

WalkGood 02-27-2012 02:35 PM

If it does turn out to be a bad battery, it's good to know that you can always get Cowon to replace it in the first year (in the USA). Outside of USA many countries have up to 2 years warranty.

DSperber 02-27-2012 04:31 PM

The battery charge icon... did it show FULL or is it essentially "empty"?

There's a large icon available on the Smart Widget desktop, but the system information bar at the top of the screen (e.g. when playing music) always has a tiny version of that icon.

What does it show?

Pipps 02-29-2012 02:42 AM

The smart desktop battery meter widget is essentially empty.

The same problem happened again this morning. The J3 turned itself off due to a reported 'low battery' after only 5 hours of play following a 3.5hr AC charge.

I immediately switched the J3 back on, and the battery meter contradictorily displayed itself as full again. It has since continued playing for another hour now - despite the battery meter now perpetually showing as empty again.

What could this problem be, and is it likely to get better with time?

meanwhile 02-29-2012 11:06 AM

Quote:

Originally Posted by Pipps (Post 601076)
The smart desktop battery meter widget is essentially empty.

The same problem happened again this morning. The J3 turned itself off due to a reported 'low battery' after only 5 hours of play following a 3.5hr AC charge.

I immediately switched the J3 back on, and the battery meter contradictorily displayed itself as full again. It has since continued playing for another hour now - despite the battery meter now perpetually showing as empty again.

What could this problem be, and is it likely to get better with time?

I wouldn't expect a more exact diagnosis than you've had from people who have never seen your player, let alone dismantled it and gone over it with test equipment. (Obvious possibilities are the battery and the charging circuitry.)

**Assuming that you tried the obvious thing of giving it an overnight charge before using it** (I think this is recommended in the manual) then: it's new and isn't working properly - return it.

Oh - and if you're charging via usb hub, plug directly into the computer - your hub might not be delivering adequate current.

ThingMan 03-02-2012 06:54 AM

Quote:

Originally Posted by meanwhile (Post 601105)
Oh - and if you're charging via usb hub, plug directly into the computer - your hub might not be delivering adequate current.

Yep, can confirm that too, even when connected to a root-usb on my laptop! However, it charges correctly when connected to my normal PC's root-usb...

There may also be a problem with a laptop or pc that goes into standby. In such cases my J3 would still report it's being charged, but when disconnected after hours of this so-called 'charging', the battery symbol soon collapses.

I've also bought a separate 240V-to-USB charger (doesn't need to be a Cowon device and will be very cheap) and that certainly works fine.

Good luck!

Pipps 03-02-2012 04:39 PM

It seems you both failed to notice that I charge by AC. Thanks for your good intentions anyway.

ThingMan 03-03-2012 06:08 AM

Quote:

Originally Posted by Pipps (Post 601398)
It seems you both failed to notice that I charge by AC. Thanks for your good intentions anyway.

A thousand excuses! You are absolutely right about not noticing you charge by AC... ;)

Nevertheless, we write for all who read and may experience similar problems.

Pipps 03-04-2012 04:45 AM

It seems that I am not the only one who has experienced problems with the J3's battery life.

It is beginning to hold up better now after it's third overnight AC charge from empty.

I will report back again soon...

lyu0001 03-09-2012 02:19 AM

My problem is that the battery showed "full", however shutdown automatically. :mad:

afraaa 03-09-2012 12:34 PM

just dont know why ppl didnt know that they should charge j3 with ac adaptor for 8 hour first time to reach great battery life

USE AC CHARGER .. NOT USB i tested it

i made mistake on my zen x-fi 2 and didnt made it again in j3 , and now i charged it and using it like 3 day

afraaa 03-09-2012 12:42 PM

and do first charge three time and dont connect it to computer , use sd card to listen music

after 3 time charge(for 8 hour ) and de charge your have better battery , trust me , i know cuz i tested it

Pipps 03-11-2012 05:30 PM

This problem gets even stranger...

I give the J3 its fifth full overnight charge, after week-long playback from its fourth charge. (So far, so good.)

Upon waking up in the morning, I switch on the fully charged J3. Within 15 seconds of being switched on, I receive the 'Battery Empty' message, and it turns itself off.

So I wait until the evening and charge it overnight again for the sixth time. The next morning, I turn it on and it works OK.

I know what you're probably thinking - he didn't actually charge it on the fifth overnight charge. Well, I did. The USB cable was fully plugged-in, and I checked to make sure that the 'Battery Charging' message was displayed before I went to bed.

So there is something very strange going on with the battery of my 32GB J3.

Does anyone have any ideas?

sompie 06-05-2012 02:45 PM

I noticed if you let the cable in when starting up the J3 thinks he is empty and shutsdown. So the cable still inside the MP3-player but out of the charger

Pipps 06-05-2012 06:30 PM

I have an update.

I returned this J3 to the retailer. I obtained a refund.

I bought a brand new J3 from a supplier in my own country. It was shipped with the latest firmware already installed.

This new J3 has worked perfectly since day-one.

No further problems to report.

Thank you.


All times are GMT -5. The time now is 07:40 AM.