Question 0% available (plugged in, not charging)

[Crimsom_247]

ASUS X540SA-XX345T Notebook was purchased on 20 December 2016 with two year guarantee.
Notebook has a built-in battery X550A26 = ASUS 0B110-00390000.
On Monday 25 February 2019, battery available status was 88% plugged in, charging on.
Battery report says design capacity 33,187 full charge capacity 17,640 mWh.
Battery life since OS install, at design capacity 3:14:04 at full charge 1:43:09.
The following day, on Tuesday 26 February, battery available status was 0% plugged in, not charging.
Battery diagnostic drivers were refreshed (updated, deleted/renewed), but battery available status was unchanged at 0%.
The Notebook was shut down and placed on continuous charge overnight.
On Wednesday 27 February 2019, battery available status was unchanged at 0%.
The Notebook crashes when unplugged from mains.
Has anyone found solution to similar problem?
Was it the battery, battery firmware, computer firmware, computer motherboard, Windows 10 OS, Windows 10 drivers, etc.?
Thank you for your assistance. Kind regards.

 

[Crimsom_247]

The ASUS X540SA-XX345T Notebook's original box included the mains charger ASUS AC Adaptor AD890M26 010-1LF. Within the first year of the manufacture's guarantee, in September 2017, the outlet adaptor (i.e. UK mains plug) was no longer captivated within body of ASUS AC Adapter because the small plastic tab had broken (design flaw).

ASUS was asked to provide a replacement AC Adapter, but they declared that their ASUS AC Adaptor was not included in their manufacture's guarantee. The seller provided a two year guarantee and offered to refund the replacement cost of another ASUS AC Adaptor AD890M26 010-1LF, but refused to refund the cost of a different AC Adaptor that would invalidate their two year gurantee. The seller's two year guarantee has now ended.

The ASUS forum recommended using HWiNFO software to determine the Smart Battery Status. This is the first time that I have seen main battery wear level criteria. My suspicions were confirmed when HWiNFO reported the X540SA main battery wear level of 100.0% and full charged capacity of 0.0 mWh.

An Unbranded/Generic AC Adaptor with identical output of 19.0VDC 2.37A 45.0W has now been purchased and used. Now HWiNFO reports the X540SA main battery wear level of 48.2% and full charged capacity of 17178 mWh.

Although this seems to be an improvement, the Notebook's main battery refuses to charge and this notebook's main battery is 'sealed' beneath the keyboard. ASUS refuse to supply a replacement battery free of charge in response to their faulty AC Adaptor's inability to provide the full charging current.

Additionally, the date and time values are now incorrect, which usually means that the CMOS battery voltage (VBAT) is too low. HWiNFO does not have a VBAT reporting capability and this Notebook has no rear panel access to the CMOS battery whose design life should be more than 10 years.

In summary, after two years, the laptop power capabilities of the (£300) ASUS X540SA-XX345T have prematurely come its end of life because of an incorrectly value engineered ASUS AC Adaptor.

That is, unless someone knows how to replace the main and CMOS batteries.