Battery tester
Original
Modified
LED
Vbat
Current
-
<10.7 V
1 mA
1
10.7 V
4 mA
2
10.9 V
3
11.1 V
4
11.3 V
5
11.5 V
6
11.7 V
7
11.9 V
8
12.1 V
9
12.3 V
10
12.6 V
17 mA
Reference:
12 V Lead-Acid Monitor
Archive
containing the Xcircuit files (encapsulated postscript).