Also notice that on my new battery controller board besides not having any temperature sensor there is also no fuse installed. And for safety reasons any cheap modification to regain the battery function is a bad idea. And after seeing the complexity of the SH79F329AX chip in the datasheet of this CPU it is unlikely that an easy repair or fix is possible to recover from being a taken down battery pack. Maybe by resetting its internal program state or by blowing a security fuse on its charging board. And no doubt the firmware after reaching a certain internal battery voltage level interrupts the battery from operating normally afterwards. This also means that the manufacturer of these replacement battery packs most likely has placed a special firmware program in these controllers. And most likely this new SH79F329AX controller is programmed with a special JTAG Flash programmer (which also the F for Flash in its name predicts). It only could reset my old original pack with a BQ 2084DBT controller chip. Also because my original battery suffered from exactly the same condition, not being able to use it only after it had lost its internal battery voltage.Īlthough BE2WORKS was able to reset that controller before I replaced the original old 18650 Li-ion cells it won’t be able to reset my new pack with the SH79F329AX chip. Which makes this product doubtful for another reason, and therefore I won’t buy another pack for my Compaq Presario C700 anymore. Notice that my replacement battery had no safety temperature sensor attached. Previous photos showed my after 2 cycles already useless replacement 10.8V 5200mAh pack.
It won’t help in any way in fixing these new kinds of packs with controllers that BE2WORKS simply can’t fix/reset. Following screen snapshot shows the information that BE2WORKS with the connected special SIL 2112 USB adapter still was able to read after my brand new pack became useless.īE2WORKS in its present state is hopelessly useless. The controller, if we read the datasheet, is a special enhanced 8051 type of CPU.
#Battery eeprom works series
The 3 in series placed x 2 HT Great Power Li-ion batteries likely were of inferior quality because it is not normal that 6 batteries lost their energy after not been discharged other than by its internal controller. Although I kept it on a safe place practical fully charged like the instructions that came with my brand new pack said, it still became useless after it apparently had lost its internal battery charge without being used! Like the 38 pins SH79F329AX chip that BE2WORKS only reads but can’t reset.Ībove photo shows my brand new battery that turned into scrap after only been used for 2 charging cycles. And sadly BE2WORKS can’t be used with most new batteries because they use new controller chips.
Sadly these new type of battery packs can’t be reset to new packs with BE2WORKS. Bad packs still can be read with the BE2WORKS program and its special USB adapter like I wrote about in my previous article. The battery pack I write about here is for my Compaq Presario C700 laptop. And neither will be charged in your laptop afterwards anymore.
And at the moment it loses its internal battery voltage below a certain level it won’t function anymore. Which happens when you leave the battery pack for a longer time out of your laptop while no longer charged. In this article I write about a new sort of battery pack that turns into useless brand new battery packs even after having been used for only 2 charge cycles. In previous repairs I wrote about successful fixing old laptop battery packs.