Li-Ion Battery replacement

[Siddhartha Jain]

Hi,

I have one of these Vosonic VP300 Mp3-cum-card reader HDD based device.
It uses a very slim 7.2v Li-Ion battery.
http://www.pccasegear.com/prod1765.htm

I am wondering if some other battery can be used to replace the OEM
ones. The replacement battery has to be the same dimensions because the
battery fits in the back between the device and the HDD mount so the
space available for the battery is fixed. I am looking at a replacement
(probably some cell phone battery) because the OEM batteries aren't
locally available in India.

Thanks,

Siddhartha

 

[Dimitrios Tzortzakakis]

Probably not.This battery looks very long, too long to fit into a cell
phone, and has a cable with a plugh, which was *never* a way to connect
batteries to cell phones.Isn't it possible to order the OEM one for your
device?

 

[PeteS]

The battery is specified as two Li+ (actually probably Li-Polymer from
that set of dimensions) 720mAH batteries. They are wired in series
(nominal Li+ terminal voltage is 3.7V).

You might want to use that as a guide to see if anyone carries such a
device near you.

Cheers

PeteS

 

[William P. N. Smith]

I have one of these Vosonic VP300 Mp3-cum-card reader HDD based device.
It uses a very slim 7.2v Li-Ion battery.
http://www.pccasegear.com/prod1765.htm

Make sure your problem is the battery and not the charger circuit
built into the box. Mine turned out the be the charge circuit, so I
just yanked the battery and have to run it on the AC wall-wart.

 

[Wolfgang Mahringer]

Dear Siddharta,

I have one of these Vosonic VP300 Mp3-cum-card reader HDD based device.
It uses a very slim 7.2v Li-Ion battery.
http://www.pccasegear.com/prod1765.htm

As Pete already pointed out, these are LiPoly accus.
Since model airplane pilots like these accu cells, it would be
easiest to find a store or online shop which carries this
kind of stuff.
You will get single cells, so you need 2.
These are sometimes labeled as "Kokams". Bring your old pack
to check the dimensions.

HTH
Wolfgang

 

[Siddhartha Jain]

Make sure your problem is the battery and not the charger circuit
built into the box. Mine turned out the be the charge circuit, so I
just yanked the battery and have to run it on the AC wall-wart.

The Li-Ion battery anyways doesn't last much. So this might help you:
http://www.camerahobby.com/Digital_VosonicPowerPack.htm

- Siddhartha

 

[Siddhartha Jain]

Probably not.This battery looks very long, too long to fit into a cell
phone, and has a cable with a plugh, which was *never* a way to connect
batteries to cell phones.Isn't it possible to order the OEM one for your
device?

I will have to get them from Australia. One battery costs US$27, which
is ok, but the shipping is $24!! So thats my last option.

- Siddhartha

 

[Ron Hunter]

I will have to get them from Australia. One battery costs US$27, which
is ok, but the shipping is $24!! So thats my last option.

- Siddhartha

It might reduce your per unit cost if you order more than one, which
probably won't increase the shipping cost.

 

[William P. N. Smith]

The Li-Ion battery anyways doesn't last much.

Yes, and the battery charge circuit doesn't always last much either.
Do you have a short battery life or _no_ battery life?

 

[Siddhartha Jain]

Yes, and the battery charge circuit doesn't always last much either.
Do you have a short battery life or _no_ battery life?

I think its the battery because initially I used to get half an hour of
play before it would conk off. Now it simply doesn't start on the
battery. And if you suggest that the charging circuit isn't very
reliable then I guess the best option is to build that external battery
pack.

Thanks,

Siddhartha

 

[William P. N. Smith]

Now it simply doesn't start on the battery.

That would be the "no battery life" answer. Get a DVM and check to
see if the charge circuit is even trying to charge the battery...