Lenovo 183825U manual Prevent hearing damage

Charging method	Tablet on	Tablet off or in screen lock mode
	(Display is on)	(Display is off)
ThinkPad Tablet Dock (fastest	Approved	Approved
charging method)
ThinkPad Tablet AC Charger	Approved, but the battery will charge	Approved
	slowly
ThinkPad Tablet DC Charger	Approved, but the battery will charge	Approved
	slowly
A USB connection between the	Might not charge due to USB 2.0	Approved
micro USB connector on the tablet	power limits.
and a USB connector of a personal
computer or other device that	If the power consumption of the tablet
complies with the USB 2.0 standards	exceeds USB 2.0 power limits, the
(slowest charging method)	battery will discharge to compensate
	for the additional power required by
	the tablet.

Charging devices might become warm during normal use. Ensure that you have adequate ventilation around the charging device. Unplug the charging device if any of the following occurs:

•The charging device has been exposed to rain, liquid, or excessive moisture.

•The charging device shows signs of physical damage.

•You want to clean the charging device.

Lenovo is not responsible for the performance or safety of products not manufactured or approved by Lenovo.

Prevent hearing damage:

Your tablet has a headphone connector. Always use the headphone connector for headphones (also called a headset) or earphones.

CAUTION:

Excessive sound pressure from earphones and headphones can cause hearing loss. Adjustment of the equalizer to maximum increases the earphone and headphone output voltage and the sound pressure level. Therefore, to protect your hearing, adjust the equalizer to an appropriate level.

Excessive use of headphones or earphones for a long period of time at high volume can be dangerous if the output of the headphone or earphone connectors do not comply with specifications of EN 50332-2. The headphone output connector of your tablet complies with EN 50332-2 Sub clause 7. This specification limits the tablet's maximum wide band true RMS output voltage to 150 mV. To help protect against hearing loss, ensure that the headphones or earphones you use also comply with EN 50332-2 (Clause 7 limits) for a wide band characteristic voltage of 75 mV. Using headphones that do not comply with EN 50332-2 can be dangerous due to excessive sound pressure levels.

If your tablet came with headphones or earphones in the package, as a set, the combination of the headphones or earphones and the tablet already complies with the specifications of EN 50332-1. If different headphones or earphones are used, ensure that they comply with EN 50332-1 (Clause 6.5 Limitation Values). Using headphones that do not comply with EN 50332-1 can be dangerous due to excessive sound pressure levels.

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