Sealey TA500 Manual page 19

 Using your computer
If you want to charge the tool using your computer, make sure
that your computer is turned on, it isn't sleeping (refer to the
computer's manual to find out how to turn sleep off), and that the
USB you connect the tool to provides power. Also, make sure to
use the high-powered USB ports which are typically found on the
computer itself ----- not on your keyboard, which is low-powered.
NOTE: If using a portable computer, make sure it is plugged into
power and that the lid or display is open because if the lid is
closed the computer may go into either standby, sleep, or
hibernation mode and the tool will not charge.
 Using vehicle DLC
If you want to charge the tool with vehicle DLC, the detailed
instructions are described as above (refer to the Power on
instructions).
Once connected, the Li-ion battery will be fully charged in about 2.5
hours. You can disconnect and use the tool before the battery is fully
charged. You don't have to wait until the battery is completely empty
before charging it again.
The battery stops charging when it's full, so you don't have to worry
if you leave it plugged in overnight (leaving the tool connected to an
electrical source all the time doesn't continuously charge it). Once
the battery is charged, disconnect the tool. If you're using your
computer to charge it, make sure that you disconnect your tool
correctly when finished charging.
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