Long Journey

Geek

Geek

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Aug 15, 2017
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So it begins. The cells I had from generic laptop batteries - held about 1200mah, but got a little hot on discharge, so I have set them aside, for lower draw applications, torches and battery banks for mobile phones. I may revisit them for my big battery bank, just put a lower draw on them.

Then I dismantled one of my Lenovo batteries they hadSony SE US18650GR. 4 of which held more than 2000mah.

One Toshiba hadSanyo/Panasonic UR18650Y, which I am yet to test. These came from a working laptop battery, the laptop had a broken screen. Hoping that they are good, as apparently they only hold 1850mah new.

The second Toshiba had some Sanyo batteries that I cannot identify. They load test at 3.5v so they should be ok. Just chasing some data before I charge them

The marking on the side reads -

Sanyo R1112

003A

They have a purple top. I shall take some better pictures tonight.

For some reason I cannot upload the picture I have.
 
Geek said:
So it begins. The cells I had from generic laptop batteries - held about 1200mah, but got a little hot on discharge, so I have set them aside, for lower draw applications, torches and battery banks for mobile phones. I may revisit them for my big battery bank, just put a lower draw on them.

Then I dismantled one of my Lenovo batteries they hadSony SE US18650GR. 4 of which held more than 2000mah.

One Toshiba hadSanyo/Panasonic UR18650Y, which I am yet to test. These came from a working laptop battery, the laptop had a broken screen. Hoping that they are good, as apparently they only hold 1850mah new.

The second Toshiba had some Sanyo batteries that I cannot identify. They load test at 3.5v so they should be ok. Just chasing some data before I charge them

The marking on the side reads -

Sanyo R1112

003A

They have a purple top. I shall take some better pictures tonight.

For some reason I cannot upload the picture I have.
Click to expand...

Ok so 36 cells in total. All load tested. Just time to check for heaters. I sill can't post pictures

A few I cant identify Green marked CGR18650CG MH12210. Apparently 3100mah. Yet to verify

I also have 6x Samsung ICR18650-22F
 
Geek said:
Geek said:
So it begins. The cells I had from generic laptop batteries - held about 1200mah, but got a little hot on discharge, so I have set them aside, for lower draw applications, torches and battery banks for mobile phones. I may revisit them for my big battery bank, just put a lower draw on them.

Then I dismantled one of my Lenovo batteries they hadSony SE US18650GR. 4 of which held more than 2000mah.

One Toshiba hadSanyo/Panasonic UR18650Y, which I am yet to test. These came from a working laptop battery, the laptop had a broken screen. Hoping that they are good, as apparently they only hold 1850mah new.

The second Toshiba had some Sanyo batteries that I cannot identify. They load test at 3.5v so they should be ok. Just chasing some data before I charge them

The marking on the side reads -

Sanyo R1112

003A

They have a purple top. I shall take some better pictures tonight.

For some reason I cannot upload the picture I have.
Click to expand...

Ok so 36 cells in total. All load tested. Just time to check for heaters. I sill can't post pictures

A few I cant identify Green marked CGR18650CG MH12210. Apparently 3100mah. Yet to verify

I also have 6x Samsung ICR18650-22F
Click to expand...

They all like to smile for the camera. But I cant post photos
 
what's the problem with posting pics? Any error message? If dragging them to the upload field doesn't work, just upload them somewhere else and just add the link to your text (with icon 'insert an image'). Or try using a different browser...

Have sun!
Oliver
 
owitte said:
what's the problem with posting pics? Any error message? If dragging them to the upload field doesn't work, just upload them somewhere else and just add the link to your text (with icon 'insert an image'). Or try using a different browser...

Have sun!
Oliver
Click to expand...

I don't know error 0. Meanwhile I burned my finger. Harvesting a laptop battery. It shorted 2s2p while i was disassembling it. At least I never lost the cells. But my finger is still recovering from molten plastic
 
Geek said:
owitte said:
what's the problem with posting pics? Any error message? If dragging them to the upload field doesn't work, just upload them somewhere else and just add the link to your text (with icon 'insert an image'). Or try using a different browser...

Have sun!
Oliver
Click to expand...

I don't know error 0. Meanwhile I burned my finger. Harvesting a laptop battery. It shorted 2s2p while i was disassembling it. At least I never lost the cells. But my finger is still recovering from molten plastic
Click to expand...

at least, you still can type :D . After I cut, burned or injured my fingers in many other ways, I now always wear gloves when taking batteries apart. We all learn by pain ;) .

Maybe you should ask Mike about your upload problem...
 
I would guess the picture upload issue is due to file size. I'm not sure what the limit is, though. Try resizing down and see how it works out.
 
I had trouble with images one time soI did a new reply and was able to attach to it. Just not to the original.
 
I have 45 cells. The Sanyo cells 12x get too hot. I'm not comfortable with soldering cells. I get the method, hot and quick. Photos coming soon
 
Ok Here are some photos of the cells I retrieved so far.


image_keulhr.jpg


Old laptop battery cases make handy makeshift battery holders.


image_vdmgec.jpg


This so far is the only cell I cannot identify:


image_rmxkdr.jpg


Its marked:
Sanyo R1112
003A

And has a purple top.

All these cells aside the grey ones in the top photo, load test without a voltage drop. Aside one set of Samsung, which only read 2v. I am wondering if I should try charge these or not. I have seen cells recover from this voltage, usually ending up with high internal resistance.

Not counting cells that may not be any good (the 12 Sanyo, and 6 Samsung) I am estimating the others to average 2300mah. I should have about 165wh. That should be perfect to run my small appliances for the evening.

I hope those Sanyo don't turn out to be heaters like most of them around here seem to.

Next weekend I will construct my charging station. Still waiting for battery holders from China.
 
I am opting to go 24v. 6p. An acquaintance of mine, an electrocs engineer, told me cells that are not discharged too far will stay in balance more readily. So I shold be able to get the mos out of my batteries. That and I can use standard 24v solar equipment.
 
Even 2v is fine to charge. I have brought some cells back from <1v and they have been some of my better performers
 
jdeadman said:
Even 2v is fine to charge. I have brought some cells back from <1v and they have been some of my better performers
Click to expand...

Interesting. I was reading an article some time ago, about LiPo batteries. Apparently, if you charge one really slowly, at 50ma, or less, you can pretty much bring anything back. I don't remember where. You have to draw the line somewhere though, that would take days if not weeks, and one must think, is a single cell really worth it.

That said, I will defiantly try to revive the cells below 2v. I only have a few batteries to harvest left, and I need virtually every cell I can get. Thinking 6s5p to start with. Then next batch of batteries 6s10p. Should give me about 700wh, here's hoping 1kwh if I am lucky. Many of my cells are holding 2500mah+
 
I'd charge them about .5a or less then cycle 2 times. The second time you will see a difference. Now let these cells rest (fully charged) for a couple weeks. Then check the voltage. If any drop voltage put those aside as play\ not useable. The rest are good to go
 
jdeadman said:
I'd charge them about .5a or less then cycle 2 times. The second time you will see a difference. Now let these cells rest (fully charged) for a couple weeks. Then check the voltage. If any drop voltage put those aside as play\ not useable. The rest are good to go
Click to expand...

Up to 50+ cells. Most are good. Just waiting on my Opus. The 20 or more that are low, I shall try restore
 
Have fun. I prefer the tp4056 and resistor based discharger ZB2L3. As I can tune the current and voltage.
 
jdeadman said:
Have fun. I prefer the tp4056 and resistor based discharger ZB2L3. As I can tune the current and voltage.
Click to expand...

Not available in Australia as far as I know.
 
Why not? Just buy from ebay with international shipping :)
 
I'm in Canada so have fairly good access to stuff from all over
 
Geek said:
jdeadman said:
Have fun. I prefer the tp4056 and resistor based discharger ZB2L3. As I can tune the current and voltage.
Click to expand...

Not available in Australia as far as I know.
Click to expand...

Just Googled them last night - my phone doesn't agree with the eBay app. The automated, but damn that's a cheap way out. Excellent tip. Save the Opus for the trouble makers.
 
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