Comments on: iPod Altoids battery pack v2

By: Rudolf

Rudolf — Wed, 28 Jan 2009 06:40:42 +0000

Jerry it is actually perfectly okay to put batteries in parallel, as long as they have the same rated voltage. By having each 9V battery only needing to supply half the current, and since battery life is measured in mAh, this dramatically increase the life of the battery. Only thing I would maybe add is a current limiting resistor. If you found out what current the iPod is usually supplied you could calculate what resistor to use and this would even further increase battery life.

Rudolf

By: William I Traceys

William I Traceys — Tue, 23 Dec 2008 01:27:12 +0000

I will need an 18 volts battery pack for a laptop computer. That weights betweem 1/2 to 3 lb.

By: jojo

jojo — Fri, 26 Sep 2008 01:39:55 +0000

did you know that all a 9v battery is is 6 aaa batteries in series hooked up to two connectors???
why now just use the aaa s instead of the 9v??

By: Jerry

Jerry — Sun, 24 Aug 2008 23:58:30 +0000

This is a bad design on many aspects: identical batteries aren’t supposed to be connected in parallel and batteries of different kind aren’t supposed to be connected each other at all. Just get a battery with a decent current and build a switching up converter to raise the battery voltage to the needed level.

By: antoine

antoine — Sun, 02 Mar 2008 19:39:13 +0000

i would like to know if he is possible to make the contrary: to charge a battery of ipod for the usb?

By: Nathan

Nathan — Mon, 11 Feb 2008 07:51:36 +0000

I’m planning on making one of these with a USB port. I have a flexible USB LED light that I want to be able to use without a laptop or computer. I suppose I could buy one somewhere, but why?

By: Justin

Justin — Tue, 27 Nov 2007 19:36:47 +0000

@ Paolo,
I was thinking the same thing.

Airport Security: “Umm. What is this?”
You: “Oh that? its just a box full of wires and batteries.”
Security: “I See would you mind stepping in here a second?”
You: “Ok Sure, But I have to catch a flight soon.”
Security: “Oh don’t worry about that, it wont be an issue.”
You: “umm. okkkk. Its just a tin of batteries and wires as a charger.”
A few hours later….
You: “No really, its a charger!!!”

*Missed Flight*

By: cooldude

cooldude — Sat, 13 Oct 2007 02:35:05 +0000

Can u make this with usb not firewire

By: Peter

Peter — Tue, 04 Sep 2007 12:01:23 +0000

Can anyone tell me where (in the UK) I can get a charger that will charge iPod batteries outside of the iPod, by connecting direct to the batteris fly leads

By: David

David — Fri, 25 May 2007 06:03:11 +0000

I wants also thanks to Drew Perry for the schematic and the original battery pack idea.I was thinking of making a usb charger with 2 9V batteries for my 2gb nano, is there any risks for this project?

By: Daniel Thorlby

Daniel Thorlby — Sun, 04 Feb 2007 15:48:55 +0000

This is amazing. Its stupid that companies don’t manufacture official external battery packs anymore. I really want one for my Sony MZ-RH1, I really do. It seems like everyone has forgotten the hardware users who don’t spend most of their lives near their PCs. If I go on holiday for a few weeks, should I really have to take my PC with me to recharge the battery for my MZ-RH1? Why can’t I just take some alkaline batteries, which are actually storeable?

By: npab19

npab19 — Thu, 11 Jan 2007 03:19:47 +0000

I was looking at your design and from the look of it it can fry your ipod and coust you about 100$ to fix it but not from apple. you would need a voltage regulater to it doesent b-caus your putting to much volts in your ipod and it can only take 5v. oh and yeah dont bring this into an airport I was stoped for about 30 min being questioned luckely my flight was delayed

By: buildakicker

buildakicker — Wed, 27 Dec 2006 19:41:31 +0000

Cool.

By: sheen

sheen — Tue, 26 Dec 2006 00:30:06 +0000

you guys are stupid

By: Paul

Paul — Sun, 17 Dec 2006 02:49:30 +0000

Can you use a USB port with out a voltage regulator?
PLEASE HELP ME!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Email me at paulrulestotaly@netscape.net