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2.2 The batteries

The batteries provide the energy for the powerchair to drive. The batteries

are connected to the DX Power Module. The DX Power Module sends the

energy of the batteries to the motors and to the other modules.

The batteries must be operated and maintained according to the instructions of the

battery manufacturer.

2.2.1 Battery type

• 24V (commonly 2 x 12V)

• Lead-Acid / Deep Cycle Gel Cell

• Rated capacity: 20 – 120 Ah (dependent on application and Power Module)

2.2.2 Battery capacity

Choose a battery capacity that is compatible with the intended use. This ensures that

the required chair range and/or operating time is achieved.

The rated capacity in Ampere-hours (Ah) of a battery is usually specified for a 20 hour

discharge rate (or 0.05 CA, a current of 5% of the rated capacity). A higher

continuous discharge current dramatically reduces the available battery capacity.

As the graph shows, when the discharge current equals the rated capacity (1 CA),

DX Saver

active (2.2.4.2)

1 2 4 6 8 10 20 40 60 2 4 6 8 10 20

Typical discharge times for lead acid batteries

Hours Minutes

Discharge time

Normal

operation

Battery

fault

Battery voltage (V)

Dynamic DX User Manual

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