- Posts: 62
- Karma: 2
- Thank you received: 2
Forum Login
power cycle count. MBA
Rendering Error in layout Widget/Social: Call to a member function exists() on null. Please enable debug mode for more information.
8 years 3 months ago #2196 by lxx33
power cycle count. MBA was created by lxx33
I did 2 efi locks with success (with your help off course).
Is the power cycle count also stored in the same eprom. If so , can that also be altered?
Tnx.
Is the power cycle count also stored in the same eprom. If so , can that also be altered?
Tnx.
Please Log in or Create an account to join the conversation.
8 years 3 months ago #2223 by thaGH05T
If I helped you, buy me a beer!!! Happy Hunting...
Replied by thaGH05T on topic power cycle count. MBA
I am not really sure as it has not been anything of value to me. Do you mean the exact power cycle count? I mean is that even stored in NVRAM? You could use the command line in userland to try and extract that info if so.
If I helped you, buy me a beer!!! Happy Hunting...
Please Log in or Create an account to join the conversation.
8 years 3 months ago #2240 by lxx33
Replied by lxx33 on topic power cycle count. MBA
it;s also not the most important deal to me 
, was just thinking if it's possible. i think it's stored somewhere separate because if i do a NVRAM reset, it still shows actual count.
, was just thinking if it's possible. i think it's stored somewhere separate because if i do a NVRAM reset, it still shows actual count. Please Log in or Create an account to join the conversation.
8 years 3 months ago #2253 by thaGH05T
If I helped you, buy me a beer!!! Happy Hunting...
Replied by thaGH05T on topic power cycle count. MBA
Where do you go to see the count?
If I helped you, buy me a beer!!! Happy Hunting...
Please Log in or Create an account to join the conversation.
8 years 3 months ago #2254 by cyber16
Replied by cyber16 on topic power cycle count. MBA
lxx33 Are you talking about the battery cycle count or is there some sort of counter for machine power on cycles I am unaware of short of the flash SSD info?
Please Log in or Create an account to join the conversation.
8 years 3 months ago #2257 by lxx33
Replied by lxx33 on topic power cycle count. MBA
About this mac,
system report,
power
And the you see the cycle count.
Not really important, but just to play with the eeproms ect.
system report,
power
And the you see the cycle count.
Not really important, but just to play with the eeproms ect.
Please Log in or Create an account to join the conversation.
8 years 3 months ago #2260 by thaGH05T
If I helped you, buy me a beer!!! Happy Hunting...
Replied by thaGH05T on topic power cycle count. MBA
You are probably right. I imagine it is stored in in NVRAM and/or the EFI. Try using the nvram command line tool to set it yourself. You could also use Phoenix tools to play around with the EFI a bit.
If I helped you, buy me a beer!!! Happy Hunting...
Please Log in or Create an account to join the conversation.
8 years 3 months ago - 8 years 3 months ago #2261 by cyber16
Replied by cyber16 on topic power cycle count. MBA
That info is stored within the Battery itself, not saying its not possible to manipulate, but it is stored within the battery.
I have 30+ MBA batteries and regardless which machine gets the battery the battery carriers over that info.
I have 30+ MBA batteries and regardless which machine gets the battery the battery carriers over that info.
lxx33 wrote: About this mac,
system report,
power
And the you see the cycle count.
Not really important, but just to play with the eeproms ect.
Last edit: 8 years 3 months ago by cyber16.
Please Log in or Create an account to join the conversation.
8 years 3 months ago #2267 by thaGH05T
If I helped you, buy me a beer!!! Happy Hunting...
Replied by thaGH05T on topic power cycle count. MBA
Well that's interesting; I guess the charging control board has some sort of memory on it as well.
If I helped you, buy me a beer!!! Happy Hunting...
Please Log in or Create an account to join the conversation.
8 years 3 months ago #2270 by cyber16
Replied by cyber16 on topic power cycle count. MBA
The logic within most laptop batteries today retain this info
Please Log in or Create an account to join the conversation.
8 years 3 months ago #2276 by thaGH05T
If I helped you, buy me a beer!!! Happy Hunting...
Replied by thaGH05T on topic power cycle count. MBA
Is there any reason why? I mean, I would think the number of charges etc. would be more pertinent.
If I helped you, buy me a beer!!! Happy Hunting...
Please Log in or Create an account to join the conversation.
8 years 3 months ago #2282 by cyber16
Replied by cyber16 on topic power cycle count. MBA
My understanding is the logic within today's batteries control all charging actions by needs as they are doing the cell to cell realtime comparisons to avoid issues such as fires. If you open up one of the batteries you will find they are built rather smart, more that just cells in a series.
Please Log in or Create an account to join the conversation.
8 years 3 months ago #2287 by thaGH05T
If I helped you, buy me a beer!!! Happy Hunting...
Replied by thaGH05T on topic power cycle count. MBA
I have opened a few to get the 18650 type cells for reuse, but none for a Mac. I have seen a main controller that resembles a LiPo style charging board with a balance line as well. But as far as the cells themselves, i have not seen any circuit protection. I was actually going to try and use the design found in one of the ones I broke open in a triple 1865 unregulated box mod for balance charging the cells internally with pass-through.
If I helped you, buy me a beer!!! Happy Hunting...
Please Log in or Create an account to join the conversation.
- .::iRizwan::.
-
- Offline
- Haxor Guru
-
- One Machine can do the work of 50 ordinary men, No Machine can do the work of 1 extraordinary man
Less More
- Posts: 155
- Karma: 3
- Thank you received: 16
8 years 2 months ago #2514 by .::iRizwan::.
if i helped you Buy me a Coffee
Replied by .::iRizwan::. on topic power cycle count. MBA
Today almost all laptop batteries are smart batteries,they keep the charge count information for battery capacity and health and some other stuff.
when someone have to reuse the battery by changing the cells they also need to reset the counters in the battery to properly get the information about charging time and remaining time etc..
when someone have to reuse the battery by changing the cells they also need to reset the counters in the battery to properly get the information about charging time and remaining time etc..
if i helped you Buy me a Coffee
Please Log in or Create an account to join the conversation.
- backdoor72
-
- Offline
- Noob
-
Less More
- Posts: 7
- Thank you received: 2
8 years 2 months ago - 8 years 2 months ago #2515 by backdoor72
Replied by backdoor72 on topic power cycle count. MBA
If you like to understand how battery firmware can be manipulate you can read this pdf by Charlie Miller(security researcher)
Last edit: 8 years 2 months ago by backdoor72.
The following user(s) said Thank You: .::iRizwan::.
Please Log in or Create an account to join the conversation.
- .::iRizwan::.
-
- Offline
- Haxor Guru
-
- One Machine can do the work of 50 ordinary men, No Machine can do the work of 1 extraordinary man
Less More
- Posts: 155
- Karma: 3
- Thank you received: 16
8 years 2 months ago #2518 by .::iRizwan::.
if i helped you Buy me a Coffee
Replied by .::iRizwan::. on topic power cycle count. MBA
Very good read backdoor72.
if i helped you Buy me a Coffee
Please Log in or Create an account to join the conversation.
8 years 2 months ago #2541 by thaGH05T
If I helped you, buy me a beer!!! Happy Hunting...
Replied by thaGH05T on topic power cycle count. MBA
That is indeed a good read, I think I may have to look into it for a future project. I really need to get a spectrum analyzer and/or an oscilloscope.
If I helped you, buy me a beer!!! Happy Hunting...
Please Log in or Create an account to join the conversation.
Moderators: token.paul
Who's Online
We have 412 guests and no members online
N00BZ
- ljamal
- ljamal74
- mikeg2atest
- ducchinhbui
- anjarezt
Cookies
EU e-Privacy Directive
This website uses cookies to manage authentication, navigation, and other functions. By using our website, you agree that we can place these types of cookies on your device.
You have declined cookies. This decision can be reversed.
You have allowed cookies to be placed on your computer. This decision can be reversed.