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Build Your Own iPod Battery
OmniVector writes "With various complaints about the iPod battery's life, and its mere 10-8 hours of charge many of us are left looking for a way to keep the tunes kicking a little longer. Drew Perry has come up with a novel solution which can only run you a few bucks for an extra 10 hours of battery life out of a box of playing cards and a everyday batteries. Not bad for that long car trip where you just don't have a firewire charger handy."
placing two cells in parallel can mean that one will discharge through the other - a stack of 6 or 8 AA cells in series would be better
I still get 12 hours of play out of an old CD player(11 years old), from too AA batteries. I havent seen anything recently which managed this.
All the recent CD players I have seen last 4 hours but have 1 Meg buffers, 2x read speed, feature, feature etc.
I'm sticking with my old CD player, It works as I want and has the only features I need (long battery life).
As I do, if you've ever taken it apart you'll notice there is quite a bit of space left in there. The battery is quite thin. I've often wondered if you could just buy another battery from say www.ipodbattery.com and install it internally, coupled in parallel with the original one. (same voltage, twice the capacity) Any EE's could verify if this would work?
I have been using an old Sony MD player for quite a while. On one (count 'em, ONE) AA battery I routinely get about 30-35 hours playback at moderate volume. I have never used any music player that even comes close to this.
on the downside, they currently have no remote and cant work as a USB harddrive without the use of additional software. fortunately, rio are constantly updating the player with new features, and are in the process of making it work as a usb harddrive.
Minidiscs are alright (i own a sony N10 [top model]). It depends what you like though. They do have great battery life, but this is at the expensive of the amp.. so thanks to their weak amps, the sound quality isn't great. they're really good for the average joe, who (shock horror) uses the stock earbuds, and is happy with things like 128kbps mp3.. but as a music fan the weak amp annoys me (which is why i'm buying a karma, and have just built a portable amp)
Contrary to popular belief, airport security personnel aren't exactly smart.
Two recent examples for you:
1. A passenger from Germany who was stopped and detained for having wires protruding from her jacket. It was nothing more than an ordinary electric jacket as used by bikers for the last twenty-odd years but that didn't stop the security guys from treating the passenger like a terrorist.
An example of them getting it wrong by going overboard.
2. A Sudanese man who was stopped at Heathrow with five live bullets in his coat. The man had just travelled from Washington DC, and the fact that someone was carrying live ammunition onto an aircraft was totally missed by the security in DC. So, security at Washington is so tight that you can get munitions onto a transatlantic aircraft without being spotted.
An example of them getting it wrong by making basic mistakes.
Remember, these are the people who insist on everything going through an x-ray machine, even materials that are highly sensitive to rays and easily damaged, because they know best and because the machines are "harmless".
"Accept that some days you are the pigeon, and some days you are the statue." - David Brent, Wernham Hogg
Then they just waved me through.
If construction was anything like programming, an incorrectly fitted lock would bring down the entire building...
The first problem with the battery pack is that it is grossly unbalanced. He shows alkaline batteries in it, so let's cruise on over to www.energizer.com and get some specs. A 9V Energizer has 625mah while AA Energizers have 2850mah capacity. Parallel the two 9V and you are only up to 1250mah, which means that the two 9V batteries will be dead before the AA cells are even half of the way used up.
Next, he is using expensive and environmentally harmful alkaline batteries rather than NiMH rechargeables. According to the EPA, Americans throw away 2 billion non-rechargeable batteries per year -- almost all of which end up in landfills. The single largest source of mercury in garbage is alkaline and button cell batteries. He took an iPod that had a battery pack that could be recharged for about a year and a half and made an alkaline pack that has to be thrown away every ten hours! It's projects like the one described here that make me think that the feds should ban all non-rechargeable batteries bigger than button cells.
Since the iPod would run on anything from 8-30V, he would have been a lot smarter to use 8 AA NiMH batteries in a case like this or this.
Nothing wrong with parallel connections as long as you charge them either conservatively or intelligently. Note the final design shown in this article actually shows primary cells. Firstly they're nominally non-rechargable, secondly their internal resistance prevents any thought-provoking excursions in the temperature and noise domains.
If the cost of a longer battery life is a larger unit, then I'd rather not have one. If I need more battery life, there's always the Belkin Battery Pack ($59.99 from the Apple store) which delivers an extra 12-15 hours of charge.
I am TheRaven on Soylent News
Anecdotal evidence at best. Answer me this question smartie:
..."
How many thousands and millions of times did Airport Security Personnel accurately spot and identify a battery/electronic posession of a passenger and determine that it was in fact safe?
Just because you've 'heard of this in the news' doesn't mean that your analytical powers are sufficient to accurately determine reality in a scenario you've had no direct experience with. You're not looking at the entire scene here: count the success as well as the failure and then compare.
Personally, I've known quite a few very intelligent security people, and had no problems with them whatsoever.
Your two anecdotes prove your argument, though. Sharp...
Remember, these are the people who insist on everything going through an x-ray machine, even materials that are highly sensitive to rays and easily damaged, because they know best and because the machines are "harmless".
"I'll ignore the fact that most 'x-ray machines' installed at major airports are in fact far more than 'x-ray devices' and do more than just 'x-ray' things, and imply that because those passengers (such as myself) are so smart, they're bringing super-sensitive materials with them through the airport security screeners, who are all sooooo stoooopid
; -- the corruption of government starts with its secrets. a truly free people keep no secrets. --
The two AA's are pretty pointless, as the iPod was rated 8 - 30V, suggesting they just used a 78l05 or similar power stabiliser (min. input voltage = output + 3V). 3.5" HDD usually only need 5V, any extra voltage is just going to get you some extra dissipated heat, and no extra playing time, because the power stabiliser has to dissipate anything above 8V.
For fsck sake, find yourself an EE 101 book or something.
On a flight from LA to San Francisco I recently took all i was taking was my rucksack as hand luggage, in it was my digital camera, a 12-pack of Duracell batteries with only eight still in the packet, four being in my camera, and my iPod and a few other bits and bobs.
My bag got flagged by the security staff and so first I was ordered to sit down in some waiting area type place while they swabbed my bag (I presume for trace explosives or something) and put it through the scanner again.
I was then given a pat-down body search, my shoes had to be taken off, put through the scanner and then swabbed, my bag was then taken away by one of the staff and I was told to wait while they tested that the batteries were actually batteries or something. I wasn't told, just ordered to sit and wait.
So after 30mins of my time wasted they decided to let me go on my merry way. What really got on my nerves is that there were no 'please' or 'thankyous' uttered by any of them, I felt as if I had done something wrong or was being treated badly just for having batteries in my bag.
I'm still waiting for plans for a homemade Belkin battery pack.
The difference?
The belkin packs, as you may have noticed, use only 4x1.5V. They don't charge the iPod battery, they power the iPod, getting 15-20 more hours of playtime, a better solution to me. This is probably done by jumping a pin in the proprietary dock connector of the iPod.
If someone could figure out which pin to jump or otherwise how to make this, it would be a wonderful solution.