Battery Testing Video for Stairmaster Steppers

This video covers battery testing on the Stairmaster steppers SC916, 4400CL, and 4600CL. The "CL" means cordless because the units run off battery power. It is a 6-volt lead-acid battery that is continuously charged as the user steps on the pedals. Over time, the charge will drop and if the unit is used less than 10 minutes at a time, it will slowly drain the battery.

Worst case scenario would be no resistance in the pedals and the console will not light up. In some cases, the console will flicker then it will go dead.

Tools Required

  • Multi Meter
  • An assistant for ease of testing


  • Set your voltmeter to read DC voltage (if your meter has ranges, use a range appropriate for the 6-volt battery being tested).
  • Place your voltmeter leads to the battery terminals and have your assistant step on the pedals.
  • The reading should be above 6 VDC. (If your reading is negative, reverse your meter leads)
  • If the battery voltage is below 6 VDC but greater than 4.8 VDC, the battery should be recharged. The battery should be allowed to charge for 24 hours.
  • If the battery voltage is less than 4.8 VDC, it is no longer good and the battery should be replaced.
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