The disk weighs about 4 ounces, the battery about 2 ounces. Add on a circuit board, some chips, some connectors, an LCD and a case and you soon get to 9.9 ounces.
The battery is Lithium Ion. The one that provides 10 hours of playing time is spec'ed at 1350 mA-Hours.
It's also replaceable - if you're on the SF to Sydney non-stop flight (14 hours) and not planning on getting any sleep, you can take a spare charged battery with you. Any other time, one battery should last you long enough.
There have been several posts in this discussion speculating on hard disk drive reliability in the PJB.
The PJB-100 as it's being shown at Comdex next week uses an IBM Travelstar drive. You can find details about it on the IBM web site.
The shock rating on this drive is 150G for 2 msec while operating, and 700G for 1 msec non-operating. 150G for 2 msec corresponds roughly to the amount of energy you get by dropping the drive from waist height. Of course, how the drive tolerates that depends on a lot of things, including what it lands on, how it lands, and how it's packaged.
You're not going to damage the disk by normal use, like jogging or using it in your car. We've had prototypes of the PJB for almost a year now, and we've used them a lot: commuting, jogging, skiing. We have never had a disk fail because of shock. It is possible to make the player report an error because you shook it too violently; but we've never had that behavior actually damage the disk.
Also, it's important to remember that the PJB never writes to the disk while you're out there playing music, it only reads it. And, of course, while playing music the disk is powered off almost all the time. Unless you use the buttons, it's on only about 20 seconds every 10 minutes. So the odds are reasonably good that when you drop it the disk isn't operating.
In reality, the most fragile component in all these players is the LCD, which is made from two very thin sheets of glass.
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The disk weighs about 4 ounces, the battery about 2 ounces. Add on a circuit board, some chips, some connectors, an LCD and a case and you soon get to 9.9 ounces.
Andrew
The battery is Lithium Ion. The one that provides 10 hours of playing time is spec'ed at 1350 mA-Hours.
It's also replaceable - if you're on the SF to Sydney non-stop flight (14 hours) and not planning on getting any sleep, you can take a spare charged battery with you. Any other time, one battery should last you long enough.
Andrew
There have been several posts in this discussion speculating on hard disk drive reliability in the PJB.
The PJB-100 as it's being shown at Comdex next week uses an IBM Travelstar drive. You can find details about it on the IBM web site.
The shock rating on this drive is 150G for 2 msec while operating, and 700G for 1 msec non-operating. 150G for 2 msec corresponds roughly to the amount of energy you get by dropping the drive from waist height. Of course, how the drive tolerates that depends on a lot of things, including what it lands on, how it lands, and how it's packaged.
You're not going to damage the disk by normal use, like jogging or using it in your car. We've had prototypes of the PJB for almost a year now, and we've used them a lot: commuting, jogging, skiing. We have never had a disk fail because of shock. It is possible to make the player report an error because you shook it too violently; but we've never had that behavior actually damage the disk.
Also, it's important to remember that the PJB never writes to the disk while you're out there playing music, it only reads it. And, of course, while playing music the disk is powered off almost all the time. Unless you use the buttons, it's on only about 20 seconds every 10 minutes. So the odds are reasonably good that when you drop it the disk isn't operating.
In reality, the most fragile component in all these players is the LCD, which is made from two very thin sheets of glass.
Andrew