To reset battery cycle count

[billubakra]

In HP Pavilion Notebooks with removable batteries how to reset the cycle count etc. to zero or to the default state as in the same state when it was bought? Have tried everything but still facing issues with battery. Currently doing wfh and batteries for our model are oos on hp's website and other websites are not delivering it here.

[Huffer]

The cycle count is maintained in the smart chip inside the battery not in the laptop. When you put a new battery in it should have zero cycles on it. No way I know of the reset the battery cycle count. That would encourage misrepresenting the battery when the laptop is resold. 

[billubakra]

Thanks. The reason why I wanted to reset the cycle count is because I read on reddit that doing that improves battery life in some oem batteries, though it is temporary. No way of doing it then?

Ran some tests

imgur.com/a/u3eAFJb

imgur.com/a/fih1bEs

What do you think? Why is cycle count not shown in BatteryinfoView? The designed capacity and full charge capacity is the same. It is around 4 years old laptop. How is this possible? I am just seeing less backup with the battery no other issues at all.

Also it is advisable to keep the laptop plugged in 24x7 even after the battery is charged? If yes then wouldn't the heat impact the battery or any circuit keeping it plugged 24x7?

Thanks

Edit- I am getting batteries from sellers who are not reputable. How to check whether or not they have been used earlier or not? Can HP support tell me that say a battery with this serial number/ct number was intended for this laptop and came with a laptop bearing serial number xxxx or some other details? These sellers are notorious but right now I don't have any other option.

I am also getting the genuine hp battery from a good source from some other state but there are some conditions apart from the fixed price and a long waiting period.

- The battery manufacturing date will be about 2 years back. Is it a good idea to purchase such an old manufactured battery? Will it have any adverse impact on its health?

- The guy is selling a minimum of two batteries (maybe to clear the stock, idk). So, say I get two genuine batteries which were manufactured two years back, they come with about a 40-50% charge right? Now I use one and keep one in a box, maybe it will not have ideal storage temps here but lets skip it for a second. Now will this second battery run fine after 2-3-4 or whatever years? Will I have to charge this battery, to 40-50%, once in a few months?

[Huffer]

That is a battery that has been through the wars. Highest cycle count I think I have ever seen. Not sure why the 3rd party battery info app is not picking up cycle count. I know of no way I recommend to reset the cycle count. The only thing I can think of doing but do not necessarily recommend is to "zap" the battery. Take a 9 bolt radio battery and run leads to the laptop battery and apply the current. Sometimes will bring a "dead" battery back to life and clear the info in the smart cell but can also kill a battery that is on its last legs so somewhat risky. 

24 x 7 charge is OK but sometimes increases the risk of swelling. My own personal main laptop is at my office and is my workstation so I need to remotely access it all hours so keep it always on and charging. I have had to replace the battery a couple times due to swelling.

A battery that has been sitting on the shelf two years is degraded somewhat and will not provide the same life it would have new. If you need to long term store a battery you have the right idea. Run it down to about 40% and store it in a dark cool place not the freezer (urban myth you still see kicked around sometimes). Should be OK for 5 years, maybe even 10 just know it loses some capacity every year it sits so after 5 years it will likely work but will not have full longevity. 

Post back with any more questions and please accept as solution if this is the info you needed. 

[billubakra]

Thanks for replying. You are so kind.

Final questions-

That is a battery that has been through the wars. Highest cycle count I think I have ever seen. Not sure why the 3rd party battery info app is not picking up cycle count.

What is the highest cycle count that you have seen? Are you sure that this cycle count is correct? I doubt that. I think the battery is messed up so the cycle count is wrong. One cycle count means 0-100% or will it count say 20-100% as one cycle count also? HP's software shows 300 as the maximum cycle count. Isn't that too less for a laptop?

As per reddit, the oem's restrict the battery's charge cycle or degrade the backup time after a certain cycles are completed via the chip and the bms, is it true for hp also?

I know of no way I recommend to reset the cycle count. The only thing I can think of doing but do not necessarily recommend is to "zap" the battery. Take a 9 bolt radio battery and run leads to the laptop battery and apply the current. Sometimes will bring a "dead" battery back to life and clear the info in the smart cell but can also kill a battery that is on its last legs so somewhat risky.

I will pass this. It is not worth the time and effort. But is it possible to change the batteries in a battery at home? The DIY guy in me will just never rest.

24 x 7 charge is OK but sometimes increases the risk of swelling. My own personal main laptop is at my office and is my workstation so I need to remotely access it all hours so keep it always on and charging. I have had to replace the battery a couple times due to swelling.

How long do your batteries last? Besides swelling if the battery is plugged in 24x7 then wouldn't the heat impact the battery or any circuit keeping it plugged all the time?

- I am getting batteries from sellers who are not reputable. How to check whether or not they have been used earlier or not? Can HP support tell me that say a battery with this serial number/ct number was intended for this laptop and came with a laptop bearing serial number xxxx or some other details? These sellers are notorious but right now I don't have any other option.

- If one is buying a battery today then how much old manufactured battery is fine as per you? Say you are buying a battery in January, 2022 and the manufacturing date of that battery is say last quarter of 2020 then will you buy it?

[Huffer · Accepted solution]

You are asking all the hard questions. You gotta understand HP does not make the batteries. Laptop batteries are made by a few factory/vendors in the Far East and all use the same cells and really are no different. I've seen cycle counts in 4 digits a few times. 

You can "recell" a battery. I have never done it but people do. You also need a new smart chip I believe. 

Batteries last in use 2- 5 years on average. 

A battery more than a year old is "old stock" and degrades every month of storage after that by a little bit.