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Gear / Technical Help => Remote Power => Topic started by: justink on December 31, 2011, 02:39:23 AM

Title: when and why did dvd batt's go through the roof?
Post by: justink on December 31, 2011, 02:39:23 AM
i remember i bought mine at about $25.

now, you're looking at double that.  what happened?
Title: Re: when and why did dvd batt's go through the roof?
Post by: stevetoney on December 31, 2011, 08:33:17 PM
Supply is way down, so price went way up.  There just aren't many of these available anymore through battery suppliers, for whatever reason.
Title: Re: when and why did dvd batt's go through the roof?
Post by: justink on December 31, 2011, 09:19:52 PM
it's insane...  i found one on amazon last night for $8 used. 

add to cart.

proceed to checkout...

cart empty.

someone bought it before i could checkout.
Title: Re: when and why did dvd batt's go through the roof?
Post by: F.O.Bean on January 01, 2012, 09:25:35 PM
it's insane...  i found one on amazon last night for $8 used. 

add to cart.

proceed to checkout...

cart empty.

someone bought it before i could checkout.

Damn, that suxks. You have been screwed :P :(
Title: Re: when and why did dvd batt's go through the roof?
Post by: mishmash on January 30, 2012, 09:14:55 PM
you can't even get it for $65 anymore.  I ordered the 12v Ultralast from wally world to have them ship it to the store, and they sent me an off-brand 7.2v one instead! Now I must rethink my battery solution.
Title: Re: when and why did dvd batt's go through the roof?
Post by: stevetoney on January 30, 2012, 10:09:14 PM
There are plenty of Li-ion packs of different voltages and capacities available on ebay.  Most are from china but seem to be reliable suppliers to the US market.  They don't have the nice lights like the DVD batteries do, but otherwise seems like they'd be just as reliable.
Title: Re: when and why did dvd batt's go through the roof?
Post by: justink on January 30, 2012, 10:29:48 PM
There are plenty of Li-ion packs of different voltages and capacities available on ebay.  Most are from china but seem to be reliable suppliers to the US market.  They don't have the nice lights like the DVD batteries do, but otherwise seems like they'd be just as reliable.

but will they work with the power cables i already have made?
Title: Re: when and why did dvd batt's go through the roof?
Post by: anr on January 31, 2012, 10:04:04 AM
One reason is that the world's Lithium Ion (or Lithium-anything) plants have been at optimum capacity for years supplying, especially, the US forces in support of various wars.  (Because their preference is for primary batteries, whereas others use rechargeables).  It only takes a small glitch, like a quality failure, to run into supply problems.  There have been numerous such failures, one after the other; notably the complete recall and destruction of both cheapo batteries you get in laptops (Dell, Sony, HP to name but three) and expensive ones used by the military.  The notable example in the latter category was as a result of a huge fraud, whereby the company crimped the cases instead of welding them.  Water got in.  As they didn't pot the state of charge / management electronics inside, the water shorted them.  The batteries blew up and injured many troops, leading to a total recall and 3 years to replace them.  If you watch Blackhawk Down, there is a scene where, in the background, a radio operator experiences what looks like a huge firework going off in his hand.  In the movie it is unexplained, but that is a Li-Ion battery being hit by a round.  Water ingress has the same effect.  Major injuries.  Just one explanation from personal experience.  Another will be the Japanese tsunami a couple of years ago.  PC Hard Drives were similarly in short supply. 
Title: Re: when and why did dvd batt's go through the roof?
Post by: cybergaloot on January 31, 2012, 10:49:24 AM
Another will be the Japanese tsunami a couple of years ago.  PC Hard Drives were similarly in short supply.

Maybe I'm misunderstanding what you are saying but the hard drive shortage came about because of flooding in Thailand, not the tsunami in Japan. Funny thing, as raw hard drives went up in price, external hard drives went down slightly. The theory I heard was that those hard drives were already in the supply system. Your point is correct though, just one hiccup in the "just in time" supply chain and all hell breaks loose. The business world took notice and they are beginning to keep a buffer now.

One weird hiccup in the just in time supply chain is Chinese holidays when nothing gets made, shipped, etc. Its getting to be a big problem to even get workers back to work. Some go off on holiday and never come back. Many of the Chinese factories are now offering financial incentives to their workers to just come back to work!