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Why nobody talks about component level repair for power tools
A retired electrician told me last year that most drill and saw failures are just bad solder joints or blown capacitors. I spent $60 replacing a router when a $0.75 cap and 10 minutes with my iron would have fixed it. Has anyone else found hidden savings inside cordless tool batteries?
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king.lisa4mo ago
Buddy of mine who fixes coffee machines on the side tore open a DeWalt 20V battery that wouldn't charge. Found one popped thermistor on the BMS board, swapped it for ten cents worth of parts, and the thing came right back to life. He's made a habit now of checking every dead tool for those little brown caps before he even thinks about buying a replacement. Funny part is he said the board itself is usually fine, it's just the cheap components they use to keep the price down that give out first.
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patel.daniel4mo ago
Has your buddy ever checked if the thermistor was the actual issue or just a symptom of something else frying it? I'm curious because @king.lisa said the boards are usually fine, but that cheap component swap might just be masking a deeper problem with the charge circuitry unless he's testing the whole path.
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fox.jesse2mo ago
Even if the board is fine, the real question is what killed that thermistor in the first place.
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