Actually, no. They use their phones as flashlights.
I even offered to sell any of mine (box-queens) at-cost or below, or buy ’em a good light from Amazon or whatever, and never had a single taker.
I once needed an 18650 to test a light, asked IT, and got back “Whut’s a 18650?”.
Guess no one even vapes or anything.
Ahh, I see. That's funny about the 18650. Some of our IT folks didn't know either. I guess they just heeded warnings not to open the packs. I get to bring 24 hour field operations and management together with technology. The guys prefer not to destroy their phones but it's taken them a little time for them to buy into lithium. We definitely have a few vapers.
Found a good deal on Panasonic NCR18650 cells for about a buck a piece. I got 2 of thes packs and they are genuine OEM battery packs. All cells measured around 3.4V out of the box, and my Opus BT-C3100 and XTAR Dragon chargers measured all cells very close to 3000mAh. The Opus charger showed just over 3100mAh on each cell and the XTAR Dragon showed just under 3000mAh. All cells measure between 35mOhms and 37mOhms using the XTAR Dragon IR probes.
Edit- in case the auction price changes, I payed $12.99 per pack of 6 cells.
What’s the date code on those?
That's the question I have too.
9X28
search “date codes” on BLF and there are posts stating that the old Panasonic cells with the dots around the top don’t work in the lookup tool.
This thread has more info.
I’ll break out my West Mountain Radio analyzer and run a few sweeps.
Seems that these may be made before 2009 according to: https://www.tomobattery.com/blog/how-to-know-panasonic-18650-battery-manufacture-date-code/
[New version of Panasonic 18650 Battery has 2 bars – a narrow bar and a wide bar. But the old version only has one narrow bar on the PVC. If you see a Panasonic 18650 battery has dot matrix on its top, it must be very old and be manufactured before 2009.]
I got a few panny-As like that, still chugging along!
I love the math
I have a Dell battery pack that i bought directly from Dell online but i don’t use the laptop anymore. I think it would be awesome if i could get some extra cells from it… Butttttt the problem is, i have no idea how to pull the cells from the pack lol.
Lots of youtube videos on taking apart laptop battery packs. It just takes a flat-head screwdriver or some other tool to pry things apart. Just make sure to not nick the cells, so you have to be careful.
Thanks. I think i will pass on this. It’s a pretty new pack. Maybe i can sell it or something. I have to actually DO what I’m trying to learn or i usually will for sure mess up
I’ve got 2 Dell packs today:
PC764 (11.1V 56Wh) contains Panasonic CGR18650E. Note that the first post contains the same pack with different cells.
C1295 (11.1V 4700mAh 53Wh) contains cells marked as “IFHFK6”. I can’t find anything about them…
Some light entertainment during the time of Covid-19 social isolation,
get around to opening a few laptop batteries I had salvaged.
Anyone else with unfinished salvage ?
I'm new to LiIon harvesting & only have experience harvesting two, old, used laptop packs. Those went OK, with one pack of 18650's testing @ just under 1,000mAh, the other set all testing ~2,500 mAh. I'll use the <1,000 set until discharges & discard them.
I was recently given a NOS HP laptop battery pack still in the HP box that is probably 10 - 15 yrs. old, at least. While disassembling, I noticed some corrosion where the wrap was deteriorated, exposing the can on two cells. There's also some minor blistering under the wraps of other cells (not pictured) that leads me to believe corrosion is growing under the wraps on those cells. In addition, I notice a sickly-sweet odor emanating from the pack. I don't trust these cells & the whole pack is residing outside until I visit a HD or other place that accepts cells for recycle.
Cells are marked LG CHEM.
The nick in the wrap above the code on the upper cell is my sloppy doing on disassembly.
Could someone please school me on the corrosion issue and perhaps the odor?
Thanks.
slmjim
Sounds like something leaked. Any time you have leakage, there’s corrosion too, so I’d be careful pulling that pack apart. The outside of the battery under the wrap is the negative contact, so be super careful with cells with damaged wraps because you can short them.