Yard force GT5664 Original Instruction page 14

charging.
9. The temperature range over which the battery pack
can be charged is typically 5ºC-45 ºC. Therefore,
charging efforts outside the prescribed tempera-
ture range may automatically be blocked by the
protection circuitry of the battery pack. Longest life
and best performance can be obtained if the bat-
tery pack is charged in the normal room condition.
10. Disconnect charger from the power supply when
not in use. This will reduce the risk of electric
shock or damage to the charger if metal items
should fall into the opening.
Special Operation safety for the battery pack
1. The Li-ion battery pack is not fully charged at the
factory. Before attempting to use it ,it must be fully
charged firstly.
2. The battery pack should be recharged when it fails
to produce sufficient power on jobs which were
easily done previously. DO NOT CONTINUE using
product with its battery in a depleted condition.
3. Do not charge the battery in an air temperature be-
low 5ºC or above 45ºC. This is important and will
prevent serious damage to the battery. Longest
life and best performance can be obtained if the
battery is charged when air temperature is about
20ºC.
4. When the machine continues to be used and the
battery temperature is above 45ºC,the battery can
not be charged, even you put on the charger. Let
the machine cool for some times and wait the tem-
perature reduced,it can be charged again .
5. Protect the battery pack against heat, e.g. includ-
SAFETY INFORMATION
12