External Battery Pack for H100 Series

[XavierGr]

Originally Posted by Big D

Hence if you had 1x1.25V 2300mAh battery

W=1.25x2.3=2.875 Watts

If 3 of these batteries were put into a circuit under your arguement:

W=3.75x6.9=25.875 Watts

However the correct answer is

W=3.75x2.3=8.625 Watts

While I agree with Haku and Big D on that I have a question.

You say that they equation is W=VA and then you note:
1x1.25V 2300mAh battery
W=1.25x2.3=2.875 Watts

But 2300 is milli Amperes per hour and A reffers to Amperes alone.
Except if you are meaning that the device wants 2300 Amperes to work!

Excuse me if I am wrong, I just want a clarification.

Oh and zezayer, although you seem to have good intensions, I dont think saying: "ur talking out of your a**e" is nice . I dont know where are you from, but when I red your comment I thought it was very rude and a little bit immature IMHO...

[Big D]

Originally Posted by XavierGr

While I agree with Haku and Big D on that I have a question.

You say that they equation is W=VA and then you note:
1x1.25V 2300mAh battery
W=1.25x2.3=2.875 Watts

But 2300 is milli Amperes per hour and A reffers to Amperes alone.
Except if you are meaning that the device wants 2300 Amperes to work!

Excuse me if I am wrong, I just want a clarification.

Oh and zezayer, although you seem to have good intensions, I dont think saying: "ur talking out of your a**e" is nice . I dont know where are you from, but when I red your comment I thought it was very rude and a little bit immature IMHO...

Watts is joules per second. The joule is a measure of energy. Energy per second is the same as the work done.

The ampere rating of a circuit measures the flow of electrons between two points of that circuit. It can be expressed as colombs per second, where the colomb is a measure of electrical charge.

The best non-electrical analagy I can use is say I have water flowing in a pipe. The flow rate per second is the same as the amperes in the electrical circuit. Say I have one pipe that allows a flow of 4 litres per minute. If I then put another pipe in that allows a flow of 4 litres per minute you will see that the maximum flow rate is still 4 litres per minute.

See these links for more information:

http://www.amasci.com/elect/elefaq.html

And please can we kindly stop all the backbiting. If this continues I will close the thread.

[zezayer]

Soz guys 4 the immaturity, i just wanted 2 get the point accross.

Glad 2 c that its sorted out now!!

[stripwax]

Originally Posted by XavierGr

You say that they equation is W=VA and then you note:
1x1.25V 2300mAh battery
W=1.25x2.3=2.875 Watts

But 2300 is milli Amperes per hour and A reffers to Amperes alone.
Except if you are meaning that the device wants 2300 Amperes to work!

Yep, and that's why the multiplication used is 1.25 x 2.3 (and not 1.25 x 2300 )

[COOL888]

I just wander if it is worthy it to build one or just buy one from boxware.com

http://www.boxwave.com/products/bund...bundle_355.htm

[boomam]

Because its cheaper and more fun to make your own.

[COOL888]

But it such a hassel to buy all parts unless you have a big collection of these things and plenty of time to spare

[boomam]

Plenty of time? Its not exactely rocket science. With the parts i could make one of those battery packs in about 10mins. And the parts can be brought for less than a fiver.

[COOL888]

Originally Posted by boomam

Plenty of time? Its not exactely rocket science. With the parts i could make one of those battery packs in about 10mins. And the parts can be brought for less than a fiver.

Interesting? Where you get all these parts?

[boomam]

Originally Posted by COOL888

Interesting? Where you get all these parts?

In the UK, where i am, Maplin Electronics, in the US? Dunno. RadioShack maybe?

[COOL888]

Thanks British gentleman, I will try to find some parts and may be this is a good project for my kid.

[sgreene]

Can you just use regular disposable AA's in the battery holder?

Seth

[1121]

Seth, your answer is Yes. You need 4 though.

[sgreene]

Are the advantages of using rechargables is that they just last longer? Can I charge the players battery with disposables? Can I run the player directly from the battery pack wit disposables? Thx

Seth

[sgreene]

Just finished my battery pack. Haven't done any charge tests or anything but the light lights up when plugged in when the player is on or off. I'm going to use disposable batteries because if I was in a place to charge rechargables I'd just charge the player itself. Thanks guys for helping along the way and making it so easy!

Seth

P.S. How do you include pictures on posts?

[deadhoarse]

I finished building my external battery pack as well. I did not use the white connector and adapter though. I bought a separate inline connector:
http://www.radioshack.com/product.as...%5Fid=274-1571

It requires you to solder the connector to a cable, but it looks a lot cleaner than using the white connector/H adaptor. I'll post a pic tonight.

It works, but the 4xAA Radioshack case is very cheaply made. When moved around, the batteries can shake, causing you to lose connection. I bought 4 of the battery packs and experienced this with each of them. I will try and track down a better made case.

[kunwar]

just built mine
very easy
and guess what minus the batteries it only cost me $AU4 + $7 for the solder wire.

Thanks for the idea guys this will help me in my trip to india in keeping the 140 charged up and rocking

Misticriver rules

[andrewmel]

Originally Posted by sgreene

Are the advantages of using rechargables is that they just last longer? Can I charge the players battery with disposables? Can I run the player directly from the battery pack wit disposables? Thx

Seth

rechargeable AA bats, unless they have improved a lot in the last 5 years, do not last as long as alkaline ones. and while the cost is a bit higher initially, it does fall as you keep recharging them. i have successfully recharged the bat on my h320 with rechargeables on a number of occasions. when i go away for a while i take 8 rechargeables and the bat pack. that way i dont have to keep looking for powerpoints.

a

[zezayer]

just bought maplin part L33AK, which contains everything to make the battery pack for the iriver, only £399

Just attach the correct plug, lining up the + on the plug with "tip" on the wire. Easy!!

Looks good aswel!, and the batterys stay in better than with my makeshift one.

Here is a piccy of it except it holds 4 batterys not two as pictured.

( http://www.maplin.co.uk/images/Full/35202i0.jpg )

EDIT: also has a on/off switch !!

[DeadMan]

£399!!!

That's one expensive battery pack dude!

You mean £3.99 obviously right?

[zezayer]

Whoops!!

yer £3.99

[kunwar]

whoever made this has got to be applauded.

My only concern is in regards to reports by users of similar battery packs with Ipods who have reported a loss in battery life of the Ipod itself due to usage with these packs.
Does anyone have any clues about this
Also id it OK if one uses this pack in regular usage along with the Iriver, in return extending battery life of the player upwards of 35-40 hours.
What do you guys think??

[zezayer]

the voltage / amperage it exactly the same as the plug in charger ( if using 4 1.2v or 1.25v (4.8v -> 5v total) 1300-2000mA batterys - generally all rechargable batterys) So i dont see why it should hurt, also usb chargers are fine and they only supply 500mA 5v.