[REQUEST] ASUS X540SA replacement "smart?" battery issues

[chrisappleby]

I have a problem with an ASUS X540SA manufactured 03-2016.
The battery is internal. Original battery was losing charge but worked for 30 mins or so before dying.
Replacement battery appears to charge ok but as soon as power lead is disconnected the laptop dies.
I've tried calibrating it, removing battery devices in Device Manager - all no good so I assumed I'd bought a duff battery.
Here comes the weird bit...the original battery now dies in exactly the same manner as the replacement!
Both batteries appear to charge ok. Both Windows and the charging lights show them charging to 100%.
But as soon as the power lead is disconnected, off goes the laptop.
I'm wondering if these batteries are smart or chipped in some way. Any ideas?

Here's what I did...
Replacement was purchased from eBay as "pulled from a new laptop" so there is an element of risk there. Opening the case involves removing a few screws from base, popping off top cover and removing 2 ribbon cables. Fitted replacement battery which has the same connector as most external fit laptop batteries and put cover back on.
Plugged in and gave it a few hours to charge.

 

[DanF]

Could be a fault in the charging circuitry? Did you do any diagnoses on that?

 

[chrisappleby]

Could be a fault in the charging circuitry? Did you do any diagnoses on that?

The old battery used to charge ok so doubt the charging circuitry is at fault. Also the charging lights on the laptop work as expected.

 

[GTP]

Have you checked the power settings? Maybe something in there that turns it off immediately on battery only?

 

[NviGate Systems]

This is common with ASUS. I've seen it before. I think they have some sort of tool at an ASUS Depot that deals with these things.

Back when I worked for Staples we often had units with odd issues like this, went to Depot, then to ASUS and they "reset" something. But we were never told what exactly.

I find most ASUS to be garbage these days, both in quality and openness of hardware.

 

[johnrobert]

Give me Acer any day over Asus

 

[chrisappleby]

Have you checked the power settings? Maybe something in there that turns it off immediately on battery only?

Already checked that.