Dell D620 Laptop Battery PC764 11.1Vdc 56Wh - Addressing Rapid Charge & Short Life Issues

Question

Hello! Suddenly, the battery in the Dell D620 laptop, type PC764 11.1Vdc 56Wh, stopped working. Earlier, it held about 1.5 hours, it is currently charging quite quickly - after charging it to 100%, it shows the working time about 30 minutes, but it only keeps a few minutes. They connect a laptop...

krzychu1985^ · Accepted Answer

It probably goes to clone the contents of this encrypted layout with the full version of the program. Then you have to replace the system with the same uncluttered or some clone of this system (I do not know what is equivalent to bq2085) and upload the copied content and only then the reset is performed. I have not done such an operation yet, I do not have the full version of the program. If there is no password - my opinion is that the game is worth the candle - you will buy a version of be2works for $ 10 for 24 hours and then it will be reset. If there is a password, you have to answer for yourself if it is worth investing in this battery.

misiozol · Accepted Answer

Should it work badly, correct pin numbers from the LPT port? How do you have LPT port set? Is everything good on the plate? Upload photos of what you did when you do not talk about it, we'll see what can be wrong.

misiozol · Accepted Answer

You told me that you have to solder into a scalak, connect to the place where the battery contacts the laptop (battery socket) there are SCL SDA GND lines, and + 5V from the PS2 / USB socket in the computer

krzychu1985^ · Answer

Leave CEA F53 alone. You need to take care of BQ20857DBT - it has an integrated eeprom. Build an interface whose schematic and board are in suspended themes, download be2works, connect sda, scl and gnd from the interface under sda, scl and gnd on the battery pinout. In the be2works program, select bq208x from the drop-down menu and click read but top right. If the system is not encrypted, the data should be read. If they do not read, the system probably has a password. At the bottom, a little on the left is also read and with this button you can read the battery data via smbus. Begin with this - because if you read the data you will know that you have connected yourself to the right contacts at the battery output.

MRCZ · Answer

krzychu1985 ^ thanks for ans reading the FAQ. If the BQ2085 system is stuck, I will not do anything?

misiozol · Answer

The equivalent of BQ2085 is BQ2085 , it is not a Chinese clone, it is original with TI.

MRCZ · Answer

I made an interface for communicating with the battery eeprom, but I do not want to act. The correctness of the submission was checked twice, despite this program SBWorkshop 3.7 demo does not detect the interface when connected to the LPT port, the power download from PS2. For the construction of the interface, I used 4 resistors 11k om, because I did not have all 10k om (as it was described in the FAQ), can it affect the interface does not work?

MRCZ · Answer

misiozol, but you were right I missed one bridge on board SBW shows that the adapter is OK, but I can not read the battery parameters - by soldering into the battery connector. In general I am surprised by the fact that on the external terminals of the battery connector, where there is a + and - contact I do not have a battery voltage and measuring directly on the links I have about 12V, which is as much as it should be. I will add that the transition is between the + and - pins of the battery connector and the cell tabs.

misiozol · Answer

P.11 That will answer your question, however you write a few times that you read

MRCZ · Answer

I desolded the PQ2085 chip and soldered directly to the legs of the chip:
VDDD + 5V - foot 8
VSSS GND - foot 19
SCL - foot 6
SDA - foot 10
I enter the Integrated Flash EEPROM tab, press read eeprom, but there is no reaction and after several such attempts, the SBW program hangs up and I do not want to turn on again, showing the message that the adapter is OK. Do you have any ideas what could be wrong, I soldered in good feet at all?

MRCZ · Answer

And the links are to be disconnected?

misiozol · Answer

The battery is to be functional with working cells and inserted into the laptop and checked with the action (after regeneration) then you can do reset, or as you prefer immediately after dismantling and checking what is the scalak (still with connected links even old) before the exchange of cells (regeneration) .

Dell D620 Laptop Battery PC764 11.1Vdc 56Wh - Addressing Rapid Charge & Short Life Issues

Post #1

Post #2

Post #3

Post #4

Post #5

Post #6

Post #7

Post #8

Post #9

Post #10

Post #11

Post #12

Post #13

Topic summary