First of all, all requests for downloads or code should be directed to the original Open Battery Information author and the GitHub link is as follows:
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I am simply sharing my experience through the journey of (unofficially) unlocking a locked out battery and would like to show that it is possible.
But! Don't worry, a user friendly solution is in the works by the Open Battery Information project, check in on their progress and contact with the GitHub link above.
What we have here is a Makita 18v battery, BL1840 to be precise. This is the final in a multi part series in an attempt to go down the rabbit hole and attempt to fix this battery.
The battery has no physical damage, the lockout is all in software... why must we throw this out and buy a new one when it is software denying us access to what we own.
Part 1 can be found here:
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Part 2 can be found here (including assembling the Arduino):
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A video on manual cell charging can be found here:
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TIMESTAMPS
0:00 Intro
4:07 Reading battery status
8:25 Attempting a fix
12:30 The results
14:37 Conclusion
I would like to thank Martin Jansson for taking the time to decipher the communication protocol which makes this project possible. He has send a binary Arduino program my way to try on this battery to recover it and will be attempting that.
Fair warning that attempting this *may* brick your Makita battery, even worse than it is now. Please attempt this at your own risk. Sometimes these Makita battery lockouts are legitimate and in such case the battery is now unsafe to use. Before attempting to unlock such a battery inspection of the inside and battery cells is very highly recommended.
Links to the original information:
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