Sony Walkman NWZ-B142 Operation Manual page 15

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Getting Started
Notes
 Charge the battery in an ambient temperature of between 5 ºC to 35 ºC (41 ºF to 95 ºF).
 The number of times the battery can be recharged before it is used up is approximately
500 times. This number may vary, depending on the conditions under which you use the
player.
 The battery indicator on the display is only an estimation. For example, one section of
black in the indicator will not always indicate exactly one-fourth of the battery's charge.
 "DATA ACCESS" appears in the display while the computer accesses the player. Do not
disconnect the player while "DATA ACCESS" appears or the data being transferred may
be damaged.
 The control buttons on the player are all disabled while it is connected to a computer.
 If you do not intend to use the player for over half a year, charge the battery at least once
per 6 to 12 months for the battery maintenance.
 Some USB devices connected to the computer may interfere with proper operation of
the player.
 We do not guarantee the recharge of the battery using personally assembled computers
or modified computers.
 If the computer enters a power saving mode, such as the Sleep or Hibernation mode,
even during USB connection, the player's battery is not charged. Instead, the player
continues to draw power from the battery, discharging it.
 Do not leave the player connected for extended periods to a laptop computer that is not
connected to AC power, because the player may discharge the computer's battery.
 If you charge the player when it has not been used for a long period, your computer may
not recognize the player or nothing may appear on the display. Charge the player for
about 5 minutes, and it starts operating properly.
 While the player is connected to a computer, do not turn on, restart, wake up from Sleep
mode, or shut down the computer. These operations may cause the player to
malfunction. Disconnect the player from the computer before performing these
operations.
 Heat may build up in the player while charging. This is not malfunction.