Around what battery charge level that reading was taken?In terms of full charge capacity reading, coconut battery shows 5115 mAh then 4590 mAh amd now back to 5138 mAh
Around what battery charge level that reading was taken?
Very steep dip from 5115 to 4590!! I'd day problem is related to these dips. Battery simply dies at some points???
Does it always dip that low in your unit when there is high load?
In my unit it seems to dip from around 5200 to 4900's (4872mAh the lowest I have recorded so far).
What was battery charge level percentage at this test? This reading is quite similar to mine (depending on battery percentage at the moment. It get lower as charge level lowers - weak battery at lower charge).Running my 2nd high load discharge right now, it just dipped to 4958 mAh.
Please elaborate? Do you mean it is that right after you charged the battery full and ran it the first time at full battery?Usually after I start charging it again, it goes back up to ~5115 mAh
What was battery charge level percentage at this test? This reading is quite similar to mine (depending on battery percentage at the moment. It get lower as charge level lowers - weak battery at lower charge).
It was around 80-85%
Please elaborate? Do you mean it is that right after you charged the battery full and ran it the first time at full battery?
Very similar readings as I see with mine. I haven't dared to run my unit to that low battery but based on my readings about dips under load, I doubt it would turn off at lower levels because it sees these 7-8% or higher dips under load at lower battery levels.It was around 80-85%
That's how it usually works. Full Charge Capacity reading returns higher when charging (during it). Also when running this Cinebench load test with charge connected it won't drop at all, so it all points to battery in my opinion.After it shuts down and charges again, usually after charging 20%, it jumps back up to 5115 mAh
What was battery charge level percentage at this test? This reading is quite similar to mine (depending on battery percentage at the moment. It get lower as charge level lowers - weak battery at lower charge).
Please elaborate? Do you mean it is that right after you charged the battery full and ran it the first time at full battery?
Very similar readings as I see with mine. I haven't dared to run my unit to that low battery but based on my readings about dips under load, I doubt it would turn off at lower levels because it sees these 7-8% or higher dips under load at lower battery levels.
Around what battery charge levels you start to see dips to 4600's? Have you even seen it even lower than that? Did you test the same with your previous units?
That's how it usually works. Full Charge Capacity reading returns higher when charging (during it). Also when running this Cinebench load test with charge connected it won't drop at all, so it all points to battery in my opinion.
I agree but I've noticed that cpu load/battery consumption can change suddenly and get rather high by just browsing web when there are advertisement and all kinds of scripts running, I've seen machine pulling over 20W is some cases. So if battery level is low and battery cannot supply stable current under load (it dips like this you listed) maybe it simply cuts power.I want to say 1.4 GHz is ok for regular lods. But even streaming netflix or youtube shouldn't be a reason to shut down
Is this under Cinebench load test?
Please check your voltage in mV at this point?
So pretty high load during that? How low you saw Full Charge Capacity during that?No cinebench, its using grapher 3D examples, the yes>/dev/null command in terminal, and streaming netflix.
Not bad. I've seen mine sometimes dipping around 10400mV but later could have been up to 10800mV! But that vary a lot and this value obviously seems to be updating not very often. So might not always show right.Vtage right now is 10728 after closing heavy load programs. Only streaming Netflix rn.
So pretty high load during that? How low you saw Full Charge Capacity during that?
Not bad. I've seen mine sometimes dipping around 10400mV but later could have been up to 10800mV! But that vary a lot and this value obviously seems to be updating not very often. So might not always show right.
That value is good to keep an eye on it for a while at different charge and load levels.
OK. Try after full charge this load test at different battery levels and keep eye on the battery voltage readings. Please report them, so we can compare and see it these have any relation to this problem.
I'd like to comment that my new MacBook 2019 13" 1.4 ghz is also shutting down unexpectedly at 35%. However, after an SMC reset and NVRAM reset, it seems to have been fixed only after going through 2 full cycles from 100%-35%. I'm currently typing this on 23% and I think this issue seems to be fixed after cycling through and the battery seems to be calibrated. Not sure this was because the battery needed to learn that 35% is not fully discharged. Has anyone tried this as a fix?
As a worried person who loves taking care of their battery, since the laptop shutdown at 35%, the real capacity wasn't 0%, was it? Was the real battery capacity 35% and the machine thought it was at 0% and shut off? Because I know discharging it completely is terrible for the battery and I really hope it just shut off at 35% and not 0% but displaying 35%.Good to hear! I think the key is completing TWO cycles of draining after SMC reset to make the laptop learn 0% is fully discharged
I'd like to comment that my new MacBook 2019 13" 1.4 ghz is also shutting down unexpectedly at 35%. However, after an SMC reset and NVRAM reset, it seems to have been fixed only after going through 2 full cycles from 100%-35%. I'm currently typing this on 23% and I think this issue seems to be fixed after cycling through and the battery seems to be calibrated. Not sure this was because the battery needed to learn that 35% is not fully discharged. Has anyone tried this as a fix?
As a worried person who loves taking care of their battery, since the laptop shutdown at 35%, the real capacity wasn't 0%, was it? Was the real battery capacity 35% and the machine thought it was at 0% and shut off? Because I know discharging it completely is terrible for the battery and I really hope it just shut off at 35% and not 0% but displaying 35%.
But I'm sure a brand new MacBook should not even have to go through this calibration process and should be able to read battery percentages correctly? Should I just exchange for a new MacBook since I'm within my 14 day window just so I can have a clean new battery?I am thinking real capacity was 0% but laptop thought there was still 35% left.
But because it's a brand new macbook, these full drains are essential to calibrate the battery percentage fully so it correctly reflects the actual charge amount left. Continous and repeated 100->0% discharges are bad for your battery as that is a full cycle count. However my rule of thumb is 80
But I'm sure a brand new MacBook should not even have to go through this calibration process and should be able to read battery percentages correctly? Should I just exchange for a new MacBook since I'm within my 14 day window just so I can have a clean new battery?
I got lucky with my 3rd macbook that it didnt need a SMC reset or anythingBut I'm sure a brand new MacBook should not even have to go through this calibration process and should be able to read battery percentages correctly? Should I just exchange for a new MacBook since I'm within my 14 day window just so I can have a clean new battery?
This is actually my second MacBook Pro because I returned the first one because I thought 3% battery drain overnight whilst on sleep was abnormal. The first MacBook I had did not shut down at all, it discharged to 20%. So I think only select MacBooks are affected.I know we should not be going through it especially when it is right out of the box. However, just to let you know, i'm already on my 3rd macbook pro with the same issue (probably the whole lot of MBP is faulty.) You could try returning it but don't be expecting a 100% working mbp
When I first got my second MacBook, it was on 1. Now it is corrected on the third cycle.I got lucky with my 3rd macbook that it didnt need a SMC reset or anything
What battery cyle are you on, mine was crazy high for a new macbook because of the cutting off.
This is actually my second MacBook Pro because I returned the first one because I thought 3% battery drain overnight whilst on sleep was abnormal. .
What you mean? You see charge cycles increasing too fast also?What battery cyle are you on, mine was crazy high for a new macbook because of the cutting off.
I've seen mine once lost 10% overnight when it was powered off. I haven't seen that again yet, but surely it will do it again. Obviously battery is weak based on hight load test and voltages I have recorded, not to mention charge cycles increasing too fast.This is actually my second MacBook Pro because I returned the first one because I thought 3% battery drain overnight whilst on sleep was abnormal. The first MacBook I had did not shut down at all, it discharged to 20%. So I think only select MacBooks are affected.
Obviously SMC has some self learning it does to compensate battery but I don't think you should see these issues in new machine.[When I first got my second MacBook, it was on 1. Now it is corrected on the third cycle.