this post was submitted on 02 Apr 2025
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This shits driven me nuts for years. Rechargeable flashlights rated in milliamp-hours?? What the fuck is that? Like they said, it's marketing bullshit so you get tricked into buying something that sucks.
But GOD FORBID WE REGULATE ANYTHING RIGHT??
Lead-acid battery OEMs are also allowed to market Ah on batteries with a 50% DoD...
Lots of people don't realize lithium is actually cheaper because of this
I guess they could still lie about watt-hours, but buying anything based off of the reported mAh capacity is a crapshoot.
Ended up with a clearly fake 18650 in my collection. Weighs way less than an older 2200 mAh one but it's label says 9900 mAh. Again, it's an 18650.
The culprit:
Shit that makes you wonder why you're trying to earn an honest living when people get away with this bullshit
I've thought about selling out my morals, but realized I could never live with myself.
The one that tempts me is preying on SovCits. They're such suckers, you could milk so much money off them and fuck em, right?
But nooooo I have to have a legitimate career...
I may be re-thinking my morals for things like that here soon. My legitimate career relies heavily on federal grant money, and my skills aren't rare enough to hope France will adopt me. Maybe I'll start a meme coin or something lol.
Any 18650 with a rated capacity of more than 4Ah is a fake. They will usually be very low capacity. The low weight and the hollow sound when you tap on it is good indicator of that too.
There are a number of reputable sites for buying 18650 cells. Stay away from Amazon and Aliexpress, they are full of fakes.
Your battery illustrates that; 9.9Ah * 3.7V is, indeed 36.63Wh. Buying anything without trust in the seller or verification by a third party is a crapshoot.
That's true, but this one came from a known (local) vendor. I took it back, and they were happy to refund it. Since they were gonna toss it, I asked if I could keep it (it works well enough to power an ESP32).
I'd be a little concerned about safety. A manufacturer or distributor that's willing to lie so blatantly about capacity might also be willing to sell cells that failed QC.
Yep. It's for an outdoor weather node on a metal pole, so damage would be fairly minimal if it had a bad day. It's also only charging at like 200 mAh (max) since it's got only a small 1W solar panel hooked to the charge controller. The only other concern would be summertime temperature, but I worry about that regardless of the cell.