Is my laptop at risk now?

Bree · 03 Nov 2018

Tsw88 said:

Excuse me, sorry, what is "missshaped batteries" . Never heard of this adjectives before?

Misshaped is a real word, correctly used by the poster...

misshape verb
mis·shape | \ˌmis-ˈshāp\
misshaped; misshaping
...
First Known Use of misshape
15th century...

Misshape | Definition of Misshape by Merriam-Webster

Batteries that have leaked or overheated may swell and become deformed, a sign they are not safe to use and should be replaced.

I've never heard of a Li-ion leaking. However, they may overheat if they've developed a fault. I'd try charging your long ignored laptop and keep checking if the battery feels warm while it charges. If it stays cool or just mildly warm, then it is probably OK.

The real test is to see how much charge it holds, Li-Ion batteries generally last best stored fully charged, but yours has been unused for over a year and has probably gone flat by now. It may no longer be capable of holding a full charge. The only way to find out is to try it.

Tsw88 · 27 Feb 2019

Hi all. Today, after almost 2 years of time of putting it away on the shelf, I power ON my laptop again....

Here is the battery report, but I don't quite understand how to read it. Is the battery still healthy?

Usage history

History of system usage on AC and battery

	BATTERY DURATION		AC DURATION
PERIOD	ACTIVE	CONNECTED STANDBY	ACTIVE	CONNECTED STANDBY
2016-06-30 - 2016-07-05	-	-	0:49:49	-
2016-07-05 - 2016-08-02	-	-	1:07:15	-
2016-08-02 - 2016-10-06	3:17:28	-	0:51:46	-
2016-10-06 - 2016-10-17	0:28:38	-	0:46:49	-
2016-10-17 - 2016-11-06	2:29:42	-	1:31:59	-
2016-11-06 - 2017-01-05	0:30:22	-	0:59:30	-
2017-01-05 - 2017-02-11	0:28:38	-	-	-
2017-02-11 - 2017-03-21	0:29:22	-	-	-
2017-03-21 - 2017-04-01	0:01:08	-	0:13:25	-
2017-04-01 - 2017-04-11	0:05:36	-	-	-
2017-04-11 - 2019-02-28	0:37:11	-	1:05:38	-

Battery capacity history

Charge capacity history of the system's batteries

PERIOD	FULL CHARGE CAPACITY	DESIGN CAPACITY
2016-06-30 - 2016-07-05	23,843 mWh	23,843 mWh
2016-07-05 - 2016-08-02	46,900 mWh	46,960 mWh
2016-08-02 - 2016-10-06	46,838 mWh	46,960 mWh
2016-10-06 - 2016-10-17	45,700 mWh	46,960 mWh
2016-10-17 - 2016-11-06	45,700 mWh	46,960 mWh
2016-11-06 - 2017-01-05	44,650 mWh	46,960 mWh
2017-01-05 - 2017-02-11	44,430 mWh	46,960 mWh
2017-02-11 - 2017-03-21	44,430 mWh	46,960 mWh
2017-03-21 - 2017-04-01	44,430 mWh	46,960 mWh
2017-04-01 - 2017-04-11	44,430 mWh	46,960 mWh
2017-04-11 - 2019-02-28	44,430 mWh	46,960 mWh

Battery life estimates

Battery life estimates based on observed drains

	AT FULL CHARGE		AT DESIGN CAPACITY
PERIOD	ACTIVE	CONNECTED STANDBY	ACTIVE	CONNECTED STANDBY
2016-06-30 - 2016-07-05	-	-	-	-
2016-07-05 - 2016-08-02	-	-	-	-
2016-08-02 - 2016-10-06	3:07:38	-	3:08:07	-
2016-10-06 - 2016-10-17	4:27:02	-	4:34:24	-
2016-10-17 - 2016-11-06	3:45:06	-	3:51:19	-
2016-11-06 - 2017-01-05	6:04:28	-	6:23:20	-
2017-01-05 - 2017-02-11	5:00:02	-	5:17:07	-
2017-02-11 - 2017-03-21	2:50:06	-	2:59:47	-
2017-03-21 - 2017-04-01	0:04:16	-	0:04:31	-
2017-04-01 - 2017-04-11	4:19:10	-	4:33:56	-
2017-04-11 - 2019-02-28	1:19:57	-	1:24:31	-

Current estimate of battery life based on all observed drains since OS install

Since OS install

2:47:13

-

2:58:35

-

Bree · 27 Feb 2019

Tsw88 said:

Hi all. Today, after almost 2 years of time of putting it away on the shelf, I power ON my laptop again....

Here is the battery report, but I don't quite understand how to read it. Is the battery still healthy?

The critical part of the report is the most recent Charge capacity history report. Yours shows the battery capacity is down just a little bit at 94.6% of its design capacity. This is hardly a significant loss of capacity and is normal for a healthy battery that has seen some use. All batteries loose a little capacity each time they are charged, yours has a lot more useful life left in it.

PERIOD	FULL CHARGE CAPACITY	DESIGN CAPACITY

2017-04-11 - 2019-02-28	44,430 mWh	46,960 mWh

Tsw88 · 27 Feb 2019

Bree said:

The critical part of the report is the most recent Charge capacity history report. Yours shows the battery capacity is down just a little bit at 94.6% of its design capacity. This is hardly a significant loss of capacity and is normal for a healthy battery that has seen some use. All batteries loose a little capacity each time they are charged, yours has a lot more useful life left in it.

Hi, thank you for your comment.

In fact, I have only used this laptop for less than 10 times, after getting it for three years of time, as you can see from the report above, and most of the time it's kept safely in the bag. Why looks like the battery life drops so fast??

Steve C · 28 Feb 2019

Tsw88 said:

Hi, thank you for your comment.

In fact, I have only used this laptop for less than 10 times, after getting it for three years of time, as you can see from the report above, and most of the time it's kept safely in the bag. Why looks like the battery life drops so fast??

Your battery health is amazing considering your laptop has been neglected for so long!

Tsw88 · 01 Mar 2019

Steve C said:

Your battery health is amazing considering your laptop has been neglected for so long!

So, from now on, do I need to turn on my laptop and use it for a few hours if it's left neglected for some time in order to keep the battery healthy?

Because this is a laptop I did not intentionally buy for myself, it was for my son for learning, but he then did not use it and
always stick to the mobile tablet.

Steve C · 01 Mar 2019

Tsw88 said:

So, from now on, do I need to turn on my laptop and use it for a few hours if it's left neglected for some time in order to keep the battery healthy?

Because this is a laptop I did not intentionally buy for myself, it was for my son for learning, but he then did not use it and
always stick to the mobile tablet.

Yes, and Windows Update will run to keep the PC up to date.

Bree · 01 Mar 2019

Tsw88 said:

So, from now on, do I need to turn on my laptop and use it for a few hours if it's left neglected for some time in order to keep the battery healthy?.

You have a healthy battery. The best way to keep it that way is not to fully discharge it. Each full discharge and recharge cycle will reduce its capacity by a little bit, so try not to let it run down too often (or at all). Use the laptop with the charger plugged in whenever possible, this will avoid discharging the battery and prolong its useful life.

Similar to a mechanical device that wears out faster with heavy use, the depth of discharge (DoD) determines the cycle count of the battery. The smaller the discharge (low DoD), the longer the battery will last. If at all possible, avoid full discharges and charge the battery more often between uses.

How to Prolong Lithium-based Batteries - Battery University

Tsw88 · 01 Mar 2019

Bree said:

You have a healthy battery. The best way to keep it that way is not to fully discharge it. Each full discharge and recharge cycle will reduce its capacity by a little bit, so try not to let it run down too often (or at all). Use the laptop with the charger plugged in whenever possible, this will avoid discharging the battery and prolong its useful life.
How to Prolong Lithium-based Batteries - Battery University

Is it also advised to pull out the battery when AC is used? I almost always keep the battery anytime anywhere, is it bad?

Bree · 01 Mar 2019

There is no advantage in removing the battery while on AC as the charging circuit will turn off all charge to the battery (even a trickle charge) once it reaches 100% capacity.

Anyway, on many current laptops you can't without removing the base cover first, so it's a moot point.