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Experiences with TI BQ management IC’s when re-building laptop batteries ?

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azzido:
The TI bqEVSW does not contain the custom chip plugins. It contains only the plugins for the public chips.

As far as I know, Apple uses in their latest batteries an old TI chip bq20z451 but with different firmware version, V5.xx, V7.xx, V10.xx. Be2works program does not support these firmwares. I found a tool which seems to be an all-in-on device to repair laptop batteries: https://www.laptopu.ro/product/professional-laptop-battery-analyzer-nlba1/
Here is the supported list for laptop battery chip reset: https://www.laptopu.ro/product/chip-reset-repair-laptop-battery/ it supports the bq20z451 apple up to V5 firmware.
I contacted them and they said that they can unseal Apple firmware version higher than V5 remotely but it requires to have their NLBA1 device.

Does anyone has NLBA1 device ? I don't want to pay 249$ just to repair one battery.

amyk:

--- Quote from: peterburk on May 20, 2021, 12:59:07 pm ---Can any of you help me figure out what to try next? Any advice would be helpful! I'm willing to try voltage glitching, but wouldn't that just trigger the PFF again?
--- End quote ---
Power/timing analysis.

Like picking a lock, you want to change one byte or even bit at a time on each try, and observe the effects that has on the current draw and timing.

azzido:

--- Quote from: Fraser on May 20, 2021, 01:11:05 pm ---Apple offered a battery replacement battery deal on my iPad Air2 at a cost of £80 and they gave me a brand new iPad Air2. For me, that was a good deal. Have you asked your local Apple service centre what they charge fir battery replacement on your MAC ? I see that in the UK the price appears to be £129 or £199 depending upon model of MAC PRO. It may be worth investigating ? A decent quality replacement battery could easily cost £80 so £129, including labour, did not sound too bad to me.

Apple appear to be aware of the bad publicity that battery failure in Apple products has attracted in the past and seem to have offered reasonable solutions at reasonable cost for such failures.

https://support.apple.com/en-gb/mac/repair/service

Fraser

--- End quote ---

Unsealing Apple bq20z451 newer firmwares V5, V7, V10 requires not sending a simple 2 x 32 bits password like on most bq20zxxx chips. The firmware is Apple and unsealing means sending about 150-200 commands, yes, a lot of commands. Unsealing algorithm is like a chain of pairs challenge and response. It is very difficult to figure out how the algo is implemented. If you have EV2300 I can unseal your battery for free. Just install AnyDesk or TeamViewer and contact me in private.

torture:

--- Quote from: azzido on July 02, 2021, 10:39:02 pm ---The TI bqEVSW does not contain the custom chip plugins. It contains only the plugins for the public chips.

As far as I know, Apple uses in their latest batteries an old TI chip bq20z451 but with different firmware version, V5.xx, V7.xx, V10.xx. Be2works program does not support these firmwares. I found a tool which seems to be an all-in-on device to repair laptop batteries: https://www.laptopu.ro/product/professional-laptop-battery-analyzer-nlba1/
Here is the supported list for laptop battery chip reset: https://www.laptopu.ro/product/chip-reset-repair-laptop-battery/ it supports the bq20z451 apple up to V5 firmware.
I contacted them and they said that they can unseal Apple firmware version higher than V5 remotely but it requires to have their NLBA1 device.

Does anyone has NLBA1 device ? I don't want to pay 249$ just to repair one battery.

--- End quote ---

I'm using the NLBA device already 1 month and i'm quite impressed to be honest. Definetely worth every cent. Basically you can use it in 2 ways as a battery charger/discharger for calibration & testing and the most important it has chip reset features. The list of supported chips in quite good. I managed to reset many BQ20zxx chips, also bq9000 & even the newest ones like 40z55/55 it unlocks them in 2-3 seconds. I dont't know how they do it? Maybe they know the master passwords? A few days ago i had a Macbook Pro Battery with BQ20Z451 chip V7 which is not officially supported so i contacted the developers and they said no problem we can reset it over Anydesk, it took around 5-6 minutes i saw them typing all kinds of crazy commands which i didin't understand but in the end the job was done chip was unsealed and reset. I highly reccomend it for any computer shop. I have also Be2Works but it's absolute garbage!

azzido:
Have you paid extra for Macbook battery remote unseal ?

It looks like an all-in-one device but mainly for those who are repairing more batteries. I have only one. Do you know if these guys can repair my battery with CP2112 ?

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