Invacare XTERRA GT User Manual page 72

To ensure long battery life DO NOT allow your batteries to become totally discharged. If your power
chair is not used for any length of time the batteries must receive a full charge once a month and
remain fully charged during storage.
For replacement batteries contact your local INVACARE supplier/dealer in order to ensure that the
new batteries are of the correct type and specification and are correctly installed and connected.
WHEN TO CHARGE
Keep an eye on the battery charge indicator on the joystick box - at full charge all ten lights will be
on (from right to left: green, amber, red). As the battery charge drops during power chair operation
successive lights will extinguish until eventually only the two red lights will be on. It means that you
must charge the Batteries without delay. We strongly advise you, however, not to wait until this
critical point has been reached but to charge the batteries as early and as often as possible after
you have used your power chair. If you ignore the warning (only two red lights on), and the battery
charge drops further to a level where it is no longer sufficient to allow safe driving, the controller will
automatically cut the power supply to the motors, so that the power chair comes to an abrupt halt,
and you may find yourself stranded in an unpleasant situation.
Also, if you run down the Batteries to such a low charge, you will have greatly reduced their potential
service life.
Except in emergencies, NEVER drive on discharged Batteries, this will add strain to them and
reduce their life.
We recommend batteries should be charged every time the power chair is used, independent of the
depth of discharge. Depending on this and their capacity, a full charge on completely discharged
Batteries can take up to approximately eight hours.
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