Calibration of Battery Charge Level Gauge Samsung R710 Laptop

T

TonyDpc

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In Nov 2019 I purchased a 2-Power Lithium battery pack Samsung AA-PB2NCB6B from Laptopsandspares.com in the UK to replace the original genuine Samsung battery.

All went well with the new battery until around 3 months ago when the charge inductor light shows red with the battery gunge displaying 98% and charging, despite being on permanent charge the gauge never reached 100%.

I understand according to the Lapttopsand spares instructions that replacement batterers need to be calibrated to the new host machine, this involves running the battery as flat as possible then removing it and refitting it after a few minutes and then recharging the battery in the machine.

The machine will only allow the battery to drop to 7% then the system goes into hidbernation mode.

This appears to work for a week or so with the green full charge light on and the battery gauge showing 100%, but if ever the laptop is used on battery alone once the laptop is plugged back into the mains he red light remains on and the battery level guage displays 98%.

I wonder if anyone has any idea's or solutions to this issue?

Thank you.
 
Hi,
Thank you for the reply pointing this out,

I am sorry, I now realise that my post is confusing, in fact it is the gauge on the laptop that needs to be calibrated to any new replacement new battery.

I have uploaded the instructions.

Kind Regards
 

Attachments

xrobwx71 said:
I may be wrong but Lithium batteries should not need calibrating. @Digerati
Click to expand...
TonyDpc said:
I now realise that my post is confusing, in fact it is the gauge on the laptop that needs to be calibrated to any new replacement new battery.
Click to expand...
Right on both counts. Calibrating is not really the correct word. Synchronizing may be more appropriate. I have to assume some marketing weenie decided to use calibrate way back when, and that just stuck.

What needs to happen is the laptop's battery monitoring circuits need to be "calibrated" to the battery. This is not really calibrating the "gauge" but rather the charge monitoring circuits to ensure the battery never gets over-charged and so it never gets discharged to 0%. Over-charging can cause excessive heat and damage the battery. And fully discharging can damage the battery too (which is why you can't go below 7%). Calibrating will also ensure it has enough charge left to leave enough time to automatically save what you are doing, then "gracefully" shutdown (or go into hibernate) before the battery runs out of charge.

It is important to note that the notebook has no clue the demands you will put on the battery in the next second, minute or hour. It only knows what is happening this second. So all times are best "guess" estimates.

Note that batteries (OEM or replacements) should be calibrated periodically. Check your laptop user manual for that.

Also, note that many laptops have a Battery Reset button. This is typically accessed with a straightened paperclip through a tiny hole in the bottom of the case (like the manual tray eject hole found in most optical drives). Again, check your laptop user manual.

All batteries weaken over time and some will never display 100% after they have aged some - depending on how they are used.

That said, one trick I have used that is sometimes successful is to run through the calibration process 3 times. Only this time, when the battery runs down, hibernates, then powers off the notebook, instead of plugging in the charger, try to power on the computer again. Keep trying to power on the computer until it refuses to power on. This typically takes 2 - 3 attempts after the battery first runs down.

Then connect the charger until it tops off. Hopefully, after the 2nd or 3rd cycle with this process, it will go to 100% on your gauge. If it never does, I would contact Laptopsandspares.com and see if they will replace it.

BTW, what are your runtimes? That is, once it fully charges (or goes to 98%) do you seem to have the expected amount of battery run time before the battery charge runs out?

Also, why did you replace the battery in the first place?
 
Hi Digerati,
Thank you for your reply, I replaced the original Samsung battery because it was around 7 years old and no longer holding charge, my laptop was also showing a warning that the original battery was failing.
Windows power efficiency diagnostics test of the original battery confirmed it need replacing
This afternoon I spoke to David of Laptopsandspares and explained the problem and what action I had taken and asked if he could recommend any additional auction I could take, he said I had done everything they recommend.
David went on to say it was unusual to get a problem with their batteries as their manufacturer used the best cells and suggested I use some sort of program to monitor the condition of the replacement battery they had supplied, although he had he no suggestions as to which program to use.
David did suggest that my laptops BIOS may need updating?
As to how long the charge lasts when running my laptop on battery power alone, I haven't really checked I just keep watch on the charge gauge, the length of time the charge lasts does seem to depend on what programmes and applications are running over the period.
This afternoon I went through the discharge and recharge procedure as per the 2-Power instructions and the green full charge light is now showing with the charge icon showing fully charged 100% (connected to mains)
However this has happened before and the situation usually lasts for only a few days.

You mentioned a Battery reset button under the laptop, should this be pushed when the battery is fully charged or near flat?

Thank you

Kind Regards
 
If you are not noticing your battery is discharging abnormally fast, then I would not suspect that is a problem.

As far as when to press the reset button, nothing I have read suggests when, other than when the firmware is updated, the system keeps locking up (or won't power up), or when the battery is "behaving abnormally" - whatever that means.

So the way I see it, there is no wrong time to press it.
 
Hi Digerati,

Thank you for the reply and advice.

Yesterday went through the usual recommended routine battery discharge, removed battery, then replaced it and put back on mains charge until the green light was showing and the battery gauge displayed 100% fully charged.
Yesterday Shut down the laptop, then switched the mains power off.

This morning booted up laptop on battery and ran on battery power for 15-20 minutes, red battery light displayed then switched on mains power charge gauge showed 96% charging, used laptop for around i hour then put laptop to sleep but left on mains power for an hour, switched laptop back on red battery light showing , battery gauge at 96% and charging.
Checked Samsung R710 manual no reset button mentioned.
Turned off laptop, switched off power and disconnected cable,
Turned over laptop to find reset button.
No reset button on the bottom or around Laptop edges.
Removed battery, no reset button under it.
Replaced battery.
Reconnected to mains power.
Booted up, red battery light showing, battery gauge at 96% showing charging .
Two hours later no change in either.

Do you have any suggestions?

Thank you

Kind Regards
 

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