Invacare TDX SP User Manual page 151

The last 3 LED (two red and one orange) mean a remaining capacity of about 15 %.
• Driving with blinking red LED's means an extreme stress for the battery and should be avoided
under normal circumstances.
• When only one red LED is blinking, the Battery Safe feature is enabled. From this time, speed
and acceleration is reduced drastically. It will allow you to move the mobility device slowly out of
a dangerous situation before the electronic finally cuts off. This is deep discharging and should
be avoided.
• Be aware that for temperatures below 20 °C, the nominal battery capacity starts to decline. For
example, at -10 °C the capacity is reduced to about 50 % of the nominal battery capacity.
• To avoid damaging the batteries, never allow them to be fully discharged. Do not drive on
heavily discharged batteries if it is not absolutely necessary, as this will strain the batteries
unduly and shorten their life expectancy.
• The earlier you recharge the batteries, the longer they live.
• The depth of discharge affects the cycle life. The harder a battery has to work, the shorter is its
life expectancy.
Examples:
- One deep discharge stresses the same as 6 normal cycles (green /orange display off).
- The battery life is about 300 cycles at 80% discharge (first 7 LED off), or about 3000 cycles at
10% discharge (one LED off).
NOTE:
The number of LED can vary depending on the remote type.
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