Question about Coby MP-C7082 Digital Media Player

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No Power Absolutely no sign of charging (model has internal lithium). On, off, front (USB) port, rear port - Vista doesn't see it, but more importantly it is not charging. (I guess I'll boot into XP and see what happens. I'll update after that) Thanks

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  • Anonymous Mar 09, 2009

    I have no wall charger for it, so it blows. and then when i hook it up to the computer it will turn on and say its charging but it'll never fully charge and when i take it off, it turns off and wont turn back on

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Coby's tech support / cust. serv. was familiar with the "no power" complaint.
Exchanged it - no problems - works great.

Posted on Apr 13, 2008

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Why isnt my ipod charging?


iPod's battery doesn't charge


Several things could keep your iPod's battery from charging. The major causes are listed below in logical order. Check each one to see if it's what's keeping your battery from charging.


Low-powered USB port

iPods that connect to USB ports require a high-power USB port.

Keyboards and some USB hubs will not charge iPod. Connect iPod directly to the computer or to a USB AC power adapter. Click here for more information.

Connect directly to computer

If you connect iPod to something that connects to the computer (like a USB hub or FireWire drive), connect iPod directly to the USB or

FireWire port on the computer.

FireWire port on a Windows PC

The FireWire (IEEE 1394) ports on some Windows-compatible computers may not be powered, and consequently won't charge iPod when you plug it in. Check here to see if the FireWire port on your PC can charge iPod.

Your computer goes to sleep

Your computer can only charge iPod when it's turned on and not asleep. Make sure your computer is on and not set to go to sleep when you want to charge iPod. Tip:

Some Macintosh computers can charge iPod even though they're asleep.
If your sleeping computer doesn't charge iPod, don't worry, just wake it and let iPod charge.


hope this helps

Aug 14, 2012 | Apple iPod touch

Tip

The iPod USB Charger


<p>The USB cable that came with all iPod has two purposes: to your device to your computer so you can update and add music, and iPod to charge. All iPods have a lithium ion battery stops charging when the battery is full, the total life of your battery is not affected if you leave the iPod is connected to a power source. It usually takes four hours to recharge most iPods. <br /> <p><br /> <p>1. Connect the USB connector into an available high-power USB 2.0 port on your computer. Low-power USB ports, such as those in external keyboards and hubs do not work. <br /> <p><br /> <p>2. Connect the 30-pin connector at the other end of the USB cable 30-pin connector on your iPod. If you charge an iPod shuffle, there is no dock connector port. Instead, use the connector on the other end of USB cable that fits in the headset. Set the iPod down and let it recharge. <br /> <p><br /> <p>3. Unplug the USB cable when the iPod battery indicator is full. If you charge an iPod shuffle, the green light will appear. <br />

on Aug 09, 2011 | Apple iPod touch

1 Answer

Boot error please format unit, this is my daughters, that I bought her a couple of years ago, she hasn't used it much and of coarse I can't find the installation disk.


Using Xp and or Vista you will not need drivers for your player. It should show up under hardware in device manager as a portable device, if it has a yellow exclamation mark or a question mark under other devices delete it and right click the small computer icon at the top of the tree and chose scan for changes. Then chose portable device. Next Xp or Vista will want Media player 10 or higher to see your player, also you may have to turn off any anti virus that may cause a problem. Try hooking up on the back side of your computer, the USB ports on the rear of a computer are set up to power such devices better than the front panel USB ports. Leave it hooked up for a while to be sure it has charged some.

Jan 21, 2010 | RCA OPAL M4001 MP3 Player

1 Answer

Sansa clip wont power up unless hooked up to usb


http://www.sandisk.com/media/175960/clip_um_0608_eng.pdf

Windows XP SP2
• Windows Media Player v10
• Intel Pentium class PC or higher
• CD-ROM drive
• USB 2.0 port for hi-speed transfers and charging

Make sure HOLD button is not on.

Battery
The Sansa
®
Clip player comes with an internal rechargeable battery. To use the player for
the very first time, remember to fully charge the battery. You can charge your Sansa
®
player through the USB port of your computer, a car adapter (not included) USB port, or AC
adapter (not included) USB port.
Charging
To charge the battery, please follow these steps:
1. Connect the larger end of the USB cable into an available USB port on the
computer.
2. Connect the smaller end of the USB cable into the Sansa
®
Clip player.
3. The computer must be on for most USB ports to charge your battery. Your
Sansa
®
will show connected and the yellow charging indicator will appear.
The battery level indicator will blink while charging. You will not be able to
play while connected to the computer USB.
4. To stop recharging, simply disconnect the cable.
The battery can also be charged using an AC adapter (not included) or a car adapter
(not included) and you will be able to play your device while charging with one of the
adapters.
NOTE: Some low-power USB ports may not be able to provide enough charge
power. Also note that the rechargeable batteries are not replaceable.

Feb 26, 2009 | SanDisk Sansa m200 SDMX3-512 MP3 Player

1 Answer

No charge...


Hello mandag78,

The error message you are talking about occurs when a device tries to draw more power from the USB port then the port can provide,

Make sure you are connecting the MP3 player directly to a USB port on the computer or a USB hub that has an independent power source (one that you plug into an electrical outlet). If you are plugging your MP3 player into a USB keyboard or a non-powered hub the port may not have enough ower to charge it.

I am assuming tha tthe Zen was working before? And that you are sing the exact same USB port and cord that you were using to charge the item previously? If so, then what you are experiencing might be a sign that the unit has failed and is in need of repair.

Best Regards,
Ken
"Go Ahead. Use Us."

Jun 24, 2008 | Creative Labs ZEN Vision:M Digital Media...

2 Answers

Zen shuts off after only playing a few songs


How long have you been doing this for (months)? You may have already drastically reduced the life of your battery

Battery
& Charging

The Zen’s battery:

The Zen uses a 3.7v rated Lithium-Ion rechargeable battery. A 3.7v rated Lithium-ion battery actually gets charged to around 4.2v with a tolerance of +/- .05v. A charge of 3.7v/3.8v is actually about a 50% SoC. At 3.3v, lithium-ion batteries have typically only utilized 70% of its 100% charge capacity.

Charging Voltage = 4.2v (4.1v)
Nominal Open-Circuit Voltage = 3.7v (3.6v)

A note on Over-Discharging and Over-Charging:

In general, Lithium-Ion batteries do not like to be overcharged (usually above 4.2v) or excessively discharged (under 2.5v-3.0v). If a Lith-ion battery falls below 1.5v, then typically you shouldn't try to recharge it at all for "safety" concerns. A fully discharged lithium-ion battery causes the formation of copper shunt in the cell which begins to get extremely hot when attempting to recharge. A lithium-ion battery should not be charged above 4.3 volts. Above 4.3 volts and the cell causes lithium metal plating on the anode. The cathode material becomes an oxidizing agent and loses stability and begins releases oxygen. This can cause the battery to heat up. Lithium-ion cells should never get above 130°C (265°F). At 150°C (302°F) the cell becomes thermally unstable and can eventually lead to a thermal runaway. These are the safety reasons why the low and high voltage cut-off and temperature sensing circuits are used. If the internal temperature of the battery gets to high, the temperature sensing circuit can initiate a mechanical pressure switch that will permanently cut-off the current path and prevent anymore charging.

How do you charge the Zen (Battery)?

It can be charged by connecting it to a USB port on a computer or by using an AC Wall Charger within the Zen's charging specs (see below).

Can I use my cell phone's AC Charger to charge my Zen?

I believe the max input voltage of the Zen is around 5v. Most devices that can charge or run off the USB host power can handle the max 5v of USB ports. 4.2 volts is usually the max Lithium ion batteries are charged to. It is usually around when the high voltage circuit is triggered and stops the charging of the battery. I would not connect a charger to the Zen that puts out more volts then 5v with an output current beyond 2400mA (2.4A) to be safe.

When and how often to charge?

To be safe, I would avoid frequent full discharges because this puts additional strain on the battery and usually shortens its life. Partial discharges with frequent recharges are better than one deep one. Recharging a partially charged lithium-ion does not cause harm because there is no "memory effect" like with older type Ni-Cd (nickel-cadmium) batteries.

Do I need to charge the Zen for hours before I use it for the first time?

With Lith-Ion batteries, the first charge isn't any different then any other charge. There is no technical need to fully charge it the first time you get it other then the fact of being able to use it longer since it will have a full charge. They are not like other types of previously used rechargeable batteries that needed the full charge at first. Most likely by the time you get everything all figured out and loaded onto the device, the battery would be fully charged anyway.

Please note: I do recommend that you at least connect the Zen to a computer while it has sufficient charge on the battery in order to properly be detected and have its devices drivers load properly. In other words, don't use your new Zen for a period of time to where you drain enough power from the battery to just come on and turn off automatically or to the point the Zen doesn't come on at all. If you do, then you may have detection and charging issues when you go to connect the Zen to the computer.

How long will the battery in the Zen last?

Lithium-Ion batteries have a life span of about 300-500 discharge/charge cycles or 2-3 years from being manufactured.

Storing or not using the Zen for long periods of time:

Lithium-ion batteries (by themselves) with no built-in voltage monitoring circuit have a really low self-discharge rate (1-2% a month) when not being used. Having the addition of voltage monitoring circuits will slightly increase the discharge rate, but should not reach the point of excessively discharging the battery to where it won't turn back on unless sitting unused for an extended period of time and if its last state before powering off was a already in a low voltage state. So, as long as you aren't storing it for long periods of time at a low discharged voltage, the battery should be ok to recharge.

Accidently left the Zen plugged into the Computer all night or for a long period of time:

I wouldn’t make a habit of doing so. Long term usage like that could shorten the life of the battery. Although you may be fine for a while, leaving it plugged in occasionally all day and night, most likely won't hurt it, but leaving it plugged in every day and night may not be a good idea. Although once it is charged to 100%, the battery's internal high voltage cut-off circuit should keep the battery from over-charging and the devices charging circuit should keep applying a trickle charge when detected a drop in charge below full. However, keeping a Lithium-ion battery plugged in and fully charged keeps the battery's temperature elevated. Exposure to prolonged elevated temperatures can cause capacity loss which can then cause the battery to no longer be able to charge or hold a charge. Plus, it may be a small chance, but there is a chance that exposure to this condition for long periods could also increase the chance of a circuit failure (charging, high voltage, temperature sensing) and allow for a severe over-charge to take place to the point of thermal runaway which has been known to cause the occasional "exploding" battery, but in most cases just melt (and take some of the device with it) or catch fire.

A note regarding USB and charging:

Per the USB specs:
USB 1.1 = Minimum supply voltage is 4.4v
USB 2.0 = Minimum supply voltage is 4.75v
Both maximum supply voltages are 5.25v and a current of 500mA.

Before the USB bus interface can begin charging a device (Zen), it must return a device identifier to the hub driver (or device driver). Once the hub driver has the returned information from the device (like power requirements, supported transfer speeds, etc.), it can then begin charging the device based on those retuned values. This process is called Enumeration. Until enumeration has completed, it may not draw more than 100mA from the bus. Once enumeration has completed, it can then begin drawing up to the 500mA allowed by the USB bus.

Jun 23, 2008 | Creative Labs Zen Digital Media Player

1 Answer

I have an coby mp3 player model num:mp.c7085 i connected it to the pc to chage but it doesn't light up to showit is charging. what can i do?


Some of the computer FRONT usb ports only transfer signals but don't provide power. Try hooking your player to one of the REAR usb ports and see if it charges.

Jun 21, 2008 | MP3 & Digital Media Players

2 Answers

Usb not recognized on sansa e280 (sandisk)


Unfortunately, so simple - although this simple solution does not appear in any manual. the solution: put your Sansa in the rear USB - and the PC immediately recognizes the MP3 or MP4. The USB soccket in the front of the PC does not have enogh power, and when using the rear USB port - it works!

Izi

izimann@lycos.com

Apr 04, 2008 | MP3 & Digital Media Players

1 Answer

Charge mp3player


If there is no removable battery (implying it has a internal rechargeable battery) then the device will charge from the USB port.

Please note : Some USB ports will not charge your device if its power requirement is too high! (EG. like ones found on the back computer keyboards)

Try the usb ports directly on the workstation.

Please don't forget to rate!

Feb 28, 2008 | RCA TH1101 MP3 Player

1 Answer

Power sugre with m240


Hi there. This message would indicate any one of the following: 1. You have a lot of USB devices plugged in to your computer, and the maximum power supply for the USB ports has been exceeded by plugging this player to your computer. It would be best if you unplugged 1 or 2 of the USB devices connected for the time being. 2. You are plugging the player on your front USB port, and may need to plug it in the rear USB port to acquire ample power supply (front USB ports do not get as much power as the rear USB port -- sad but true) 3. You are using a laptop and may need to try another USB port on that computer. Purchasing a self-powered USB hub would be ideal as it gets its power supply directly from the wall electrical socket.

May 11, 2007 | SanDisk Sansa m240 MP3 Player

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