Question about NHJ Limited VHD-5100 (5 GB) MP3 Player

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Lithium ion battery

Please I need information on where to get a new battery for the vhd-5100. all the details I have is that it is a litium ion 4.2v 1000mah. many thanks

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Re: lithium ion battery

Try going to Ebay and buying a battery for the Handspring Treo 300. They are very inexpensive. The battery is about the same size. The connector is a little bit different but seems to fit OK. The Treo 300 battery has been working in my VHD-5100 for about a year now.

Posted on Dec 09, 2007

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Can i use android tablet while charging

Yes you can. New lithium ion batteries don't have battery memory. So it's safe to charge whilst using it!

Nov 04, 2012 | Kocaso M760P 1.2GHz 4GB 7" Capacitive...

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Do I Charge The Speakers While Its On

Are you asking whether the battery will be damaged? I doubt it. It shouldn't make a difference if you charge it whilst using it. Like most/all new electronic devices, they should use lithium ion batteries

Nov 02, 2012 | MP3 & Digital Media Players

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Wont charge properly, music only last 5 minutes or so

Hello there :)

Try to chance the battery and see if it helps or read this site :

The write on the site :
5. I'm sure my THUMP is fully charged, so why doesn't it play music?
  • Make sure the volume is not set too low to hear.
  • Make sure there are song files stored on THUMP. Connect THUMP to your computer and open the folder that shows the contents of the THUMP memory
  • Make sure you have the correct music file formats loaded into the THUMP memory. Currently, THUMP plays MP3, WMA and WAV file formats. No other music file formats are supported at this time.
  • Make sure the WMA music files you are trying to play are not protected by DRM. (See below for more information on DRM.) If the song files are protected by DRM, you need to download the DRM Enabled Utility found at
6. Why can't I get a full six hours of song play time out of THUMP?
  • Many things affect play time, including the volume level, file compression and music file format. Also, lithium ion polymer batteries gradually lose their charge while not in use. These batteries are also susceptible to temperature.
  • Even though they represent the best technology available, lithium ion batteries do not perform best in high heat.
7. Is it best to completely drain the THUMP battery before recharging?
  • It makes no difference. Lithium ion batteries have no "memory effect" like older technologies such as nickel cadmium, so you can charge them at any time - even when they are not fully discharged.
Hope thats helps
If not then try to return here

Please rate my answer :)

Jun 10, 2010 | Oakley Thump MP3 Player

2 Answers


Try resetting the device it?s usually a small pinhole on the back or side of the device try holding that in for about 10 seconds IF THIS DOES NOT WORK TRY THIS: Try reflashing the firmware for your device you can find the latest firmware and flashing utilities from the Coby's website. Make sure that you back your music up first because when you do this you are setting it back to factory settings.

Oct 03, 2009 | Coby MP-C7085 MP3 Player

1 Answer

Explosion of a lithium ion battery

this is also called reverse charging.

Reverse charging, which damages batteries, is when a rechargeable battery is recharged with its polarity reversed. Reverse charging can occur under a number of circumstances, the two most important being:
  • When a battery is incorrectly inserted into a charger.
  • When multiple batteries are used in series in a device. When one battery completely discharges ahead of the rest, the other batteries in series may force the discharged battery to discharge to below zero voltage.

Apr 25, 2009 | Transcend T.sonic 320 MP3 Player

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I need a new battery

we solderd in an sony litium ion battery from our dead camera it has to have the three lines you just solder a wire from + to + aned - to - and mid to mid works beter than ever make sure the voltage is around the same as your enza battery.

Dec 26, 2008 | Dream'eo Enza (20 GB) MP3 Player

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

& 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

Battery NHJ VHD-5100 (5G) MP3 PLAYER.

Try going to Ebay and buying a battery for the Handspring Treo 300. They are very inexpensive. The battery is about the same size. The connector is a little bit different but seems to fit OK. The Treo 300 battery has been working in my VHD-5100 for about a year now.

Sep 10, 2007 | NHJ Limited VHD-5100 (5 GB) MP3 Player

2 Answers

NHJ Limited VHD-5100 MP3 Player


Apr 02, 2007 | NHJ Limited VHD-5100 (5 GB) MP3 Player

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