If you’re using a mod that isn’t current-regulated, then certainly. And even with a safer current-regulated mod, if the discharge is high, it could get you into trouble. I don’t mind pushing a battery near its limits in a flashlight, but I wouldn’t want to do it next to my face.
If you absolutely need a high-discharge cell where safety is a concern, buy it from a reputable dealer that you know isn’t going to give you fakes. If all you need is 5 amps or less, then even a fake is probably good enough.
I’ve had good luck with cells from China, but you never know. Sometimes it can be hard to spot fakes.
I ordered 6 30Qs from the Liitokala factory store on 17 May. Just got a message today that I think means the package was returned to the shipper as undeliverable, so they just shipped it again.
Meanwhile, the 30Qs I ordered from LiionWholesale at a much later date arrived yesterday. There might be a lesson there. Or not.
lin zhang: Hello, because your package was returned as undeliverable, give you change the other logistics today sent to you, in the 17th website can query. This is the new tracking number:
I've had a couple AliExpress orders whose shipments were cancelled; this usually gets noticed in the order details page or the tracking information page a few days after the initial waiting for pickup notice.
Paying a minimum of attention to shipments' tracking information is a nice idea because, in my experience, sellers do not seem to report their cancelled shipments to users.
The 9900 mAh 18650’s at $1/piece, are obviously a hoax.
But what about 4000 mAh 18650? Is that possible?
I’m looking for a few extra 18650’s, I currently use the black 3500 mAh Liikota cells, which were tested as very good by HJK on this forum. And yes I like them, but I’m always on the look for something better.
“Hello, because your package was returned as undeliverable, give you change the other logistics today sent to you, in the 17th website can query. This is the new tracking number:”
This cell would hit 3.4+Ah minimum down to 2.5V at 0.5A - 1A, even without the protection circuit burden (≈40mV at 1A), maybe 3.5Ah at 0.5A, but 0.5A is below the 0.2C official discharge current rating. Totally l00ks like a rewrapped Sanyo NCR18650GA (go check it out with the battery comparator).