Hi everybody,
We have an MacBook Pro (15-inch, Late 2011) that when the battery run off from power, the time and date reset.
As a PC user I would think the CMOS battery is dead.
Does the MacBook Pro (15-inch, Late 2011) have a cmos battery?
My research on the web did not give me any result on that.
Thanks in advance,
MacBook Pro, OS X Yosemite (10.10.4)
AFAIK no cmos battery.
Battery: there are certain things you should not do with a Li-ion battery: do not let it deplete further than say 20%: letting it fully die so that the unit switches off will destroy the lifetime considerably. You may let it be connected to a charger continuously, but once every 2 or 3 weeks take the charger of to say it reaches 40-60% then reconnect (this "keeps the electrons moving"). Do not do a battery "calibration": this is bad for the battery and does not reset the battery as it claims.
For your further interested reading: http://batteryuniversity.com
DeSerres tech support wrote:
We have an MacBook Pro (15-inch, Late 2011) that when the battery run off from power, the time and date reset.
The MBP will go to the default time/date when electrical power is absent. This indicates to me that the internal battery or the connection to it is faulty. Investigate the health of the battery and run an Apple Hardware Test.
Ciao.
MacBook Pro (15-inch, Late 2011) cmos battery
