A while ago I wrote a simple Python script to do this testing with an airplane/drone flight controller (they have voltage and current sensors onboard) and a constant load. Here are some of the curves I did of my batteries:
But, step #1 is pull up it's spec sheet and replicate their capacity testing method. At least for single cells. For packs there's not much you can do but buy from trusted places- manufacturer, bhphoto (for cameras).
18650batterystore has always been good to me, at least for the 300 Samsung 25R's I bought.
"One test, called a destructive physical analysis, involved dismantling small cylindrical batteries. This immediately revealed differences in quality."
I don’t think it’s common for consumers to buy 18650 lithium batteries, I mean I do and I know that they are all fake if you order them online… I’m not really understanding the point of this article. Most consumer products come with the batteries inside them already. The idea of somehow banning the import of unsafe batteries seems pretty unrealistic.
Hezbolla would also like to know. Seriously though, batteries make me nervous, they can seemingly go up in flames anytime, though it has only happened to one person i know so far. The only trouble i've ever had is old AAAs eating up some unfortunate alarm clocks.
From the article it sounds like it's practically impossible to tell if your battery is dodgy.
A while ago I wrote a simple Python script to do this testing with an airplane/drone flight controller (they have voltage and current sensors onboard) and a constant load. Here are some of the curves I did of my batteries:
https://notes.stavros.io/maker-things/battery-discharge-curv...
And here's the script itself:
https://gitlab.com/stavros/assault-and-battery/
As you can see, it's very easy to tell a new, genuine battery from an old or fake one.
I read the article... did I miss it? I still have no idea how to spot a counterfeit lith-ion battery without a CT scanner.
Looks like it was half written.
But, step #1 is pull up it's spec sheet and replicate their capacity testing method. At least for single cells. For packs there's not much you can do but buy from trusted places- manufacturer, bhphoto (for cameras).
18650batterystore has always been good to me, at least for the 300 Samsung 25R's I bought.
"One test, called a destructive physical analysis, involved dismantling small cylindrical batteries. This immediately revealed differences in quality."
I don’t think it’s common for consumers to buy 18650 lithium batteries, I mean I do and I know that they are all fake if you order them online… I’m not really understanding the point of this article. Most consumer products come with the batteries inside them already. The idea of somehow banning the import of unsafe batteries seems pretty unrealistic.
What do you mean they are all fake? There are no legit 18650 cells on places like Amazon?
Hezbolla would also like to know. Seriously though, batteries make me nervous, they can seemingly go up in flames anytime, though it has only happened to one person i know so far. The only trouble i've ever had is old AAAs eating up some unfortunate alarm clocks.
From the article it sounds like it's practically impossible to tell if your battery is dodgy.