User's Manual

- ix -
Preface
Do not use a power adapter that isn’t made for the device. Supplying the
device with inappropriate voltage may cause harm to the battery or, even
worse, burn the device.
To prevent possible hearing damage, do not listen at high volume levels for
long periods
.
Rechargeable Battery Pack Safety
With very little care, you can optimize the battery life and maximize the lifespan of
the battery. Most importantly, use the device only in its ideal operating temperature
(as described in 1.5 Specifications) – do not leave it in a hot car trunk during the
summer.
• Important Terms to Understand
“Battery life” means the time the device will run before it must be recharged
(sometimes this is also called “playtime” or “runtime”).
“Battery lifespan” means the total amount of time your battery will last before it
must be replaced.
• Using the Device for the First Time
Be sure to fully charge the device when charging the device for the first time.
(approx. 3 hours)