User's Manual

battery power. The power source indicates whether power is coming

from the battery or the AC power supply. If the battery power level

drops under 15 percent, the Braille Sense OnHand will display the

battery status on the Braille display, and it will announce (through the

speakers) that the battery has less than 15 percent of its power left. If

the battery power level falls below five percent, the Braille Sense

OnHand will give you a warning indicating that your battery power level

is under five percent, and the Braille Sense OnHand will be

automatically turned off in one minute, unless you connect the Braille

Sense OnHand to an AC power supply.

Let’s explore the detachable battery pack. When the Braille Sense

OnHand is shipped, you will find the battery pack is not installed in the

Braille Sense OnHand. This is done to prevent damage during

shipping. When you insert this battery pack in to the Braille Sense

OnHand for the first time, the unit may display an inaccurate battery

power level. Before using the Braille Sense OnHand for the first time,

please charge the battery for three hours. If you need to use the unit

during the initial recharge, the unit should be connected to the AC power

supply for at least three hours in order to fully charge the battery.

When you remove the battery from the Braille Sense OnHand, make

sure your unit is turned off; especially when the AC power supply is not

connected to your unit. Otherwise, you will lose all of your data that is

stored in RAM. If you remove the battery, and do not have the Braille

Sense OnHand hooked up to the AC power supply, your data that is

stored in RAM will remain for only about an hour. In order to keep your

data that is stored in RAM, the Braille Sense OnHand must be

connected to an AC power supply or battery pack within an hour;

otherwise the data that is stored in RAM will be lost.

2.5 Basic Explanation of Disks, folders, and files

The flash memory in the Braille Sense OnHand is similar to a big

bookshelf in a library. The piece of hardware in the Braille Sense

OnHand that is called the “disk” is similar to the idea of a bookshelf in a

library. You can make partitions on a bookshelf in order to organize