Why does my macbook turn off by itself ?

[XPcentric]

EDIT: This topic can be deleted, my macbook was programmed to auto shut down at 21.50, I think the first time it did shut down for the same reason.


When I go away from the Macbook I turn screen to sleep mode, (hibernation or auto turn off are disabled), but two times when I came back to wake the macbook it did not give any response, and I believe it has auto shut down.

Recently it happen twice until now to auto shut down, and I suspect its either because:
A - the battery condition is "Replace now" (5 years old) - but when I switched back on I could see it full as 93% and it has never made these problems in the last years, while its been still in bad condition.
B - I disabled some Daemons recently, but I tested first by killing the process and then disabling the few Daemons that I believed safe to disable.

Console last logged messages:

..............
09/04/2015 22:00:01.544 discoveryd[49]: Basic WABServer NetResolverEvent no resolvers, resetting domains

09/04/2015 22:00:01.564 shutdown[1195]: halt by nic:

09/04/2015 22:00:01.000 kernel[0]: Kext loading now disabled.

09/04/2015 22:00:01.000 kernel[0]: Kext unloading now disabled.

09/04/2015 22:00:01.000 kernel[0]: Kext autounloading now disabled.

09/04/2015 22:00:01.564 shutdown[1195]: SHUTDOWN_TIME: 1428606001 563690

09/04/2015 22:00:01.000 kernel[0]: Kernel requests now disabled.

09/04/2015 22:03:46.000 bootlog[0]: BOOT_TIME 1428606226 0

09/04/2015 22:03:50.000 syslogd[16]: Configuration Notice:
ASL Module "com.apple.AccountPolicyHelper" claims selected messages.
Those messages may not appear in standard system log files or in the ASL database. (xpcentric note: " Many Configuration Notices follow")