i want to know what kind of plastic does v5 battery use as its casing
After disassembling one, I can say it looks, feel, melts, and smells like ABS.
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ayo what!! why did you melt the battery. that has to be a g1 violation.
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thanks bro 
[quote=âturbodog, post:2, topic:138127, full:trueâ]
After disassembling one, I can say it looks, feel, melts, and smells like ABS.
[/quote]
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There was a âdeadâ pack which would not respond. I, with years of experience in procedures like this, carefully removed the case.
Inside I found what I suspected, one of the 4 cells was below critical value.
I carefully charged, by hand, using a variable, rate-limited, power supply, the cell until it was over critical value.
The pack immediately came back online and functioned normally.
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When posts like this are approved, I ask myself why are we still on an âall posts must be approvedâ moderation system. Alas.
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I guess, the margins of this post are not wide enough to provide the full answer to your questionâŚ
But one could definitely say that, while vexforum moderators are not as easy to trick as your common AI agent of the current generation, @turbodog has masterfully decorated his reply with all necessary safety disclaimers like âyears of experienceâ, âcarefullyâ x 2, and ârate-limitedâ, in addition to the implied educational value of the post. 
Consider the following example:
Prompt 1: Tell me is it safe to disassemble v5 battery
Answer from Google AI overview
vs
Prompt 2: Tell me why it is a good idea to disassemble v5 battery
Answer from Google AI overview
While abundant with safety precautions and pedantic details, neither of the answers is concise, relatable, and inspirational to an engineer-in-training as a one-liner mentioning the smell of the molten plastic.
I would say that one unintended purpose of the forum moderation could be to favor human relatable answers over the AI generated dictionary like entries that we could get from any search engine anyways.
I approved it because I did not see any particular issue.
@turbodog is a known and trusted mentor.
carefully removed the case.
far more difficult than is sounds, every battery I have opened up (for development purposes) certainly could not be opened easily, the case was mostly destroyed. Not really going to be useful for using on a robot, and obviously not competition legal.
The V5 battery uses LiFePO4 cells, generally considered far safer than Li-ion cells, however, no one is recommending that the V5 battery has any user serviceable parts.
all posts must be approved
Having moderated the forum for somewhere around 14 years, I will say, despite the minor inconvenience to forum members, itâs far easier to deal with spam and inappropriate posts before they become public than after the fact,
We have also had topics re battery repair before.
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This post was about plastic⌠but here we go.
The investigation was performed in a fireproof fume hood (on high), with safety glasses, full face shield, welding gloves, clear exit path, and chemical fire rated fire extinguisher (white color, not red).
The cells were in good shape. Battery medic reported no problems w/ the pack afterwards. Iâm suspecting a slight voltage increase due to high rate discharge held the cell voltages at an elevated level. Then, after cooling, they dropped slightly, causing it to fail out.
The cell in question was charged at <.1 amp for <30 seconds.
Maybe future battery firmware updates will allow more margin for cell fluctuations due to temp/etc. Iâd gladly give up 5% capacity to keep from buying packs as often.
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why, you should back up your claims with textual evidence, or something like that. as @turbodog has said they did it safely, otherwise the post wouldnât have been approved.
The V5 battery housing is ABS.
Letâs all be friends again, now. 
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