Dynatron® 850plus & 550plus
General Modality Information
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Battery Requirements
• 12 volt and at least 5 amps peak current (1.5 ampere hours minimum).
• Battery adapter cord
- Cigarette lighter plug on one end (to attach to the battery pack) and a barrel plug on
the other end (to fit a .325 barrel jack).
- The cord needs to be a high quality gauge wire. Radio Shack carries a high quality
cord that is recommended. Cat. No. 270-1534D. This cord comes with a 2 amp fuse.
This needs to be replaced with a 5 amp fast blow fuse.
Note: If a low-quality gauge cord is used, you can get the BATT LO error when the
battery is not low.
Battery Life
The length of time that a unit can be used with a battery pack is dependent on several factors:
• The amperage of the battery pack. A larger amperage will provide longer use.
• The modality used. Ultrasound requires more power than stim modalities.
• The intensity of the treatments. The higher the intensity, the higher the consumption of
power.
• The use of multiple treatments. The more channels used, the more power is consumed.
• The amount of charge remaining on the battery.
As a general rule, the unit may be run continuously for 30 minutes to several hours depending
on these factors.
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