Incompatible 3rd party notebook charger

[ber999]

Dear Sir or Madam,

I am having trouble with a Chinese online retailer regarding a notebook battery charger manufactured and sold by DBJBA (see Fig. 1).

In my opinion, the rights of EU buyers in the event of performance issues are still not extensive enough.

Now to my problem.

The purchase was made some time ago, so I can no longer demand the rescission of the contract as provided for in the contract.

The defect in the purchased item was not easy to identify, as the charger initially behaved normally when plugged in for a short time.

In order to inspect the circuit board inside the housing, I had to break open the housing of the newly purchased charger.

In addition, I also had to break open the housing of the defective original HP battery charger.

The comparison reveals that the notebook connection cable of the original HP charger has three wires, while the DBJBA notebook connection cable only has two wires (see Fig. 2 and Fig. 3).

The DBJBA notebook connection cable purchased as a replacement can therefore only work if the third cable is non-functional.

However, this is clearly not the case, as the corresponding HP connector has a sensor pin that controls charging.

Unfortunately, the notebook connector from the manufacturer DBJBA cannot be dismantled without destroying it (see Fig. 4).

A black connector wire can be seen, which only extends a short distance.

The white connecting wire has been stripped over a longer distance.

As can be seen from the solder residue, both wires were connected to one of the two contact cylinders of the coaxial connector.

The wires were torn off during disassembly due to the tensile forces applied.

The sensor pin must also have been connected to one of the two wires, as there is still some solder adhering to it.

It is strange that the white-coated wire is stripped over a longer distance and ends after a short piece of white wire insulation that is firmly stuck.

This short piece of white wire insulation was located immediately in front of the black cable insulation.

I tried to determine where the copper wire continued in the white wire insulation.

As the severed empty white wire insulation pieces reveal (see Fig. 4), I was unsuccessful.

Perhaps there was a weak spot in the copper strand in this area, because strangely enough, after the charger had been in operation for a while, a loose connection became noticeable almost regularly, the location of which I could not determine.

The website of the manufacturer and seller DBJBA is still available at Aliexpress.

However, nothing is currently being offered there.

Fig. 1: HP Probook 4730s DBJBA charger housing, top

Fig. 2: HP Probook 4730s DBJBA charger circuit board, bottom

Fig. 3: HP Probook 4730s HP original charger circuit board, top

Fig. 4: HP Probook 4730s DBJBA charger connector plug, open