| General > General Technical Chat |
| WTF Mouser?? |
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| LivelyLlama:
That is significant, but it doesn't seem like nearly enough to discharge the battery that far unless they were on that foam for thousands of hours. Mouser has a process where they pre-pack some items in common denominations, for instance, thru hole resistors packed by the hundred. I wonder if they are removing these batteries from the tube and storing them elsewhere? The best thing to do would be to contact the warehouse where they were delivered from, they should give you e-mail contact for this if you call them. My experience is that they've always been receptive to feedback in the past. |
| amyk:
--- Quote from: tooki on March 07, 2020, 05:34:44 pm ---Again, why is it reasonable to expect non-electronics people to understand why that's a problem? Were you taught about these things in school? --- End quote --- ...yes. :palm: --- Quote from: floobydust on March 08, 2020, 03:28:48 am ---Could Maxim/Dallas be to blame? The PowerCap datasheet has no packaging information, no formal name, it's not the "PCM". Digikey says it comes in a tube of 19 pcs. So how would the fulfillment workers know what to do? Usually you cut a tube to size- if you have extra. --- End quote --- It's right there in the datasheet: --- Quote ---ATTENTION: BATTERY COMPONENT The DS9034PCX contains a lithium battery. Do not short, ground, or apply external voltages to the electrical portions of this device. Do not expose to temperatures over +85°C. Do not subject this device to any type of cleaning process. Store only in nonconductive containers. Failure to observe these precautions may result in battery discharge or decreased battery life. --- End quote --- |
| Red Squirrel:
That's an interesting thing, I can kinda see how it could happen. A stand alone component with a battery built in that can be shorted by shorting the pins of the product is probably a rather rare thing and whoever is packaging these things is probably following some instructions like "if it says ESD sensitive use this material". Perhaps there needs to be some kind of flag for these items to make sure they don't actually use conductive packaging. I wonder if this is an issue with other stores as well. Maybe the product itself could have a tiny switch or something that you need to turn on to connect the battery internally. Of course that is an extra cost and an extra point of failure... probably not worth simply for shipping reasons. Actually this reminds me of a time I make a gag "satellite" using a pop can and foil and bunch of wires and stuff, it was for an april fools thing where I was announcing that I'm launching a satellite so just throw some stuff together for a couple pictures. Without thinking, I took a battery holder with two fresh AAs and shoved it on the can as part of the gag. Well... the pins were shorting the battery right on the can! Yeah that got pretty hot lol. Good thing it was not 18650s. Total goof moment there that could have gone horribly wrong just for a silly joke. |
| OwO:
So basically it's a component that is both ESD sensitive (crystal) and can not be stored in ESD foam. I don't get the point of this product at all, why would you combine a battery and a watch crystal (which you can get in tiny smd package for really cheap)? And finally of course it's priced sky-high ::) |
| james_s:
--- Quote from: OwO on March 08, 2020, 07:45:37 am ---So basically it's a component that is both ESD sensitive (crystal) and can not be stored in ESD foam. I don't get the point of this product at all, why would you combine a battery and a watch crystal (which you can get in tiny smd package for really cheap)? And finally of course it's priced sky-high ::) --- End quote --- If you read the datasheet it tells you. It's because it is for a surface mount assembly, so you can solder the thing on the board without exposing the crystal or the battery to high temperature. I chose these because I can replace the battery later and not have to carve the battery out of obsolete epoxy potted bricks as is the case with the ones I'm replacing. Prices sky high? At $10 these are cheap, the potted assemblies are $60 and some types are no longer available at all. These are used in some still quite expensive test gear. I don't think I've ever heard of a crystal being damaged by ESD, and I don't see any indications on the parts of them being ESD sensitive. |
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