820-00164 no charging

[bartech]

battery in no charging , orange on charger, mac is starting and working but when switched off it takes only 0.027 A

J6950
1-0
2-0
3-0
4-0,23v
5-3,43v
6-3,43v
7-8,29v
8-8,29v
9-8,29v

u7100
1-0
2-18v
3-4,8v
4-3,4v
5-1,23v
6-0
7-0,9v
8-1,36v
9-0,05v
10-3,43v
11-3,43v
12-3,43v
13-3,43v
14-3,4v
15-0,8v
16-0,96v
17-8,3v
18-8,3v
19-5,4v
20-5v
21-0,63v
22-gnd
23-8,25v
24-8,24v
25-12,51v
26-18v
27-18v
28-0v

 

[2informaticos]

Post exact resistance between pins 17/18 and 27/28.
Check diode mode to ground at SCL/SDA lines of battery bus.

Machine switch off when remove the charger (battery connected)?

 

[bartech]

17/18 - 2.7
27/28- 20.5

battery not grounded

after remove charger its still working
battery life something like 60% in coconutt but no charging

 

[2informaticos]

Did you try with known good battery?

Check/replace Q7155.