• Professional battery tester (Auto Tester).
• Sturdy design with straight glass cylinder/tube.
• Hand held tester reads specific gravity of battery acid.
• Accurate easy to read battery acid testing.
• Specific gravity of electrolyte can be checked immediately after charging battery.
This Auto Tester BT-902B battery tester (Battery Acid Tester) has been manufactured to provide accurate test readings. The float is the critical part of this instrument. Take care of it in handling and use. There are basically two types of tests, and choose the type you are going to run:
• The first type is one where you charge the battery to see if all cells accept a full charge.
• The second is where you allow the battery to become discharged and make your measurement at that point. This allows you to see if one or two cells are discharging faster than the others. This is a fairly good test to see if a cell has lost capacity.
A test cannot be made properly unless each battery cell has enough fluid to allow the float to rise freely. You will not get an accurate reading if water has been just recently added to the cells.
