Question G boy III questions

dotif

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Hey I was working on my g boy rev III, and, uhh… might have put in a battery in backwards. Only the negative battery terminal touched the g boy’s positive terminal. Some smoke flew up out of the case (I had it open) but that’s about it. No sparks or anything. I re inserted the battery correctly and nothing happened. However, some of the rvl pms components were busted and completely fried. When running, it is extremely hot to the touch, I burned my fingers inspecting it. Am I done for, or do I just need a new rvl pms?
 

Stitches

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Photos would be helpful, but yeah I think you might have done the goof there. I don't remember if ye originale PMS had reverse polarity protection, but if you got magic smoke then something is definitely fucked.
 

StonedEdge

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Instant reverse polarity of the battery (no matter how short, even a few ms will do it) will blow up the BQ charging chip and render the board useless. You can buy a replacement here https://www.ti.com/product/BQ25895M
 

dotif

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Ok thanks! Do I just need a new rvl pms board or is everything else boned?
 

Stitches

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If it was just the BQ chip that went, you can remove and replace it using a hot air station and the rest of the PMS should still be fine.
 

Stitches

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Nah, your cells will be fine
 
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