updated battery tester documentation

[physical.git] / power / battery tester / index.org

diff --git a/power/battery tester/index.org b/power/battery tester/index.org
index 21dd258..6e61e4f 100644 (file)
--- a/power/battery tester/index.org
+++ b/power/battery tester/index.org
@@ -39,15 +39,19 @@ at their terminals is good. But some old batteries will get
 empty/discharged way too quickly under normal load. This device is
 intended to discover old batteries with reduced capacity.
 
-Freshly charged batteries are tested under high load by shorting
-battery + and - terminals using 5 ohm power resistor
+Freshly charged batteries are tested under high load for short time by
+shorting battery + and - terminals using 5 ohm power resistor
 (R1). Simultaneously battery voltage is being measured while under
 load.
 
 [[file:electrical%20schematic.png]]
 
 I use vintage analog voltmeter. Instead of power resistor I use
-Nichrome resistance wire. It gets hot quickly!
+Nichrome resistance wire. Test/measurement button should not be
+pressed for long because power resistor gets hot quickly and battery
+is being quickly depleted during measurement.
+
+[[file:assembly.png]]
 
 + Body: [[file:body.png]]
 + Cover: [[file:cover.png]]
@@ -56,3 +60,6 @@ Nichrome resistance wire. It gets hot quickly!
   + [[file:bodyAndCover.FCStd][FreeCAD project]]
   + [[file:body.stl][body STL file]]
   + [[file:cover.stl][cover STL file]]
+
++ PS: While this device is interesting to build, still you can just
+  use ordinary ammeter that can handle battery generated current.