Twelve NEW 2400mAh 18650s, under $30?

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comfychair
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The HP DV4 (and similar models, not sure what all interchanges) have an optional extended 12-cell battery. The originals were rated as 8800mAh, which works out to 12 2200mAh cells inside - I bought a lightly used pack and opened it, found 12 LG 2200Ah 18650s, all in good condition. But used packs are always a crapshoot, especially if you know nothing about how it was treated in its former life.

So completely by accident I stumbled across *new* aftermarket DV4 packs on ebay, with an upgraded capacity (advertised, unconfirmed) of 9600mAh, which meant that if true, there should be 2400mAh cells inside. And the price with free shipping is, somehow, under $30. What?!

http://www.ebay.com/itm/310405754542

I bought two, and cracked them open. They may be complete garbage when used as intended as a laptop battery, but who cares about that, right? Here's what you'll find inside...

One thing to note, there was a sticker on the PCB inside that said "DV4 8.8AH", which may mean nothing fishy going on with the 9600mAh advertised rating. The internal circuitry would be the same whether the cells used were 2200 or 2400mAh, and these could have been from the same batch used to build the 8800mAh packs. Without identifying these particular cells, I'll never know.

From what I can figure '6K00112' is the model (I have 6 CJ cells from a different pack, and they are marked 6E00312) and CJ is the manufacturer... but I have no info on who or what CJ is, other than some hits for similar cells on alibaba and the like.

All cells from pack #1 were at 3.84v after they were all separated; pack #2 cells were 3.80v. All 24 charged up just fine in a XTAR WP6.

And finally, a tip for my fellow cheapskates who like cracking open laptop packs. Get yourself some of these:

Outside snap ring pliers, most commonly used for things like retaining syncros/gears/bearings on transmission shafts (remnants from my previous incarnation as an auto tech... *shudder*). Once you break open a small spot between the two halves of the casing, stick the pliers in and squeeze. POP! POP POP! And the pack is opened. No Dremeling, no hacksaws, no poking holes in the cells trying to use a screwdriver. Couldn't be easier, and on top of that you're much less likely to damage the goodies inside. Win/win.

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bads3ctor
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Verified?

Have you verified the capacity of these batteries? Are they really 2400mah? I’d like to give them a try but I don’t want to find out they are 1000mah used Chinese retreads. Thanks.

comfychair
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No, I don't have anything to

No, I don't have anything to test capacity other than using them in lights, and compared to known 2200mAh LGs they have significantly longer run times and push more current through the same load - direct drive into two XM-Ls in parallel on copper the LGs do 4.5 amps and these 'CJ's do 5.71 amps. Out of the 24 there were 4 that had the heatshrink damaged when the tabs were welded which I re-wrapped, nothing under the cover that would indicate they're anything other than brand new cells.

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comfychair
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Look at it this way: what

Look at it this way: what other options are there for 18650s for less than $2.45 each? Red/silver Trustfire "3000mAh", at a little under $2 each? I got 4 of those with the first lights I bought, 3 of them would trip the protection at 3 amps and shut the light off. The other one would just flicker even after the protection board was removed, there's something not connected inside the case. On all 4, the button tops weren't welded, held on only by the heatshrink. They are complete total garbage.

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ohaya
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Hi, I’d be interested in

Hi,

I’d be interested in these, and I have an Accucell so I can do a discharge test. Based on what you all know thus far, is it worth a try? Seems like that’s the case from this thread so far, but let me know?

Thanks,
Jim

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laptop batts

Bummer +10 dollars shipping to uk,But if you guys test and they r ok still might b worth it

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ohaya
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Hi, Well, I’ve gone ahead

Hi,

Well, I’ve gone ahead and bought one. Ebay says delivery by 3/11, but I think that I’ve dealt with this seller before, and what I bought got here (VA) faster than that… Will post back.

Jim

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Figured it out. Sold by “N&K

Figured it out. Sold by “N&K Trading”… Looks like that is tmart.com, or someone/something associated with with tmart.com.

Jim

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Bit like
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jakey
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batts

Look similar,$47 therabout for twelve so if you pay $40 for the lap pulls its not so good to us in the uk.Thanks marc.

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ohaya
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jakey wrote:Look similar,$47

jakey wrote:
Look similar,$47 therabout for twelve so if you pay $40 for the lap pulls its not so good to us in the uk.Thanks marc.

Plus you’d get 6 battery boxes too Smile!!

Jim

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Google finds hits on what

Google finds hits on what appears to be these cells. After some searching, I suspect these are 2200mAh cells… when they were new.

One of the links found a MSDS
http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&sqi=2&ved…

No wonder Majicshine cells are so crappy. But for what you paid, and if youre happy with them, thats all that matters.

ohaya
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cat eyes, What is

cat eyes,

What is “BAK”?

comfy chair,

Your pictures didn’t show it, but do these cells have button tops? Or are they flat tops?

Jim

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jakey wrote:Bummer +10

jakey wrote:
Bummer +10 dollars shipping to uk,But if you guys test and they r ok still might b worth it

Try this one: http://www.ebay.co.uk/itm/190776517081

ohaya
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cat eyes wrote:ohaya

cat eyes wrote:
ohaya wrote:
Figured it out. Sold by “N&K Trading”… Looks like that is tmart.com, or someone/something associated with with tmart.com.

Jim

i have bought a lot of stuff from them on ebay….
i did not know they were tmart…..
so maybe we can buy from tmart and get it shipped from new york….
and they have a warehouse in UK also…..

Hi,

The Ebay listing says New Brunswick, NJ, which is probably like across the river from New York:

http://maps.google.com/maps?rlz=1C1CHFX_enUS519US519&q=new+brunswick,+nj…

Incidentally, I’ve bought a lot of stuff Newegg, and that always inevitably ships out of Edison, NJ, which is almost the same place…. coincidence?

Also, before I bought the pack off of Ebay, I did do a brief search of Tmart.com, but that pulled up like 25 pages of results. The one 9600 mAh one I found was $34.99, but it looked slightly different than the pic on Ebay:

http://www.tmart.com/Laptop-Battery-7200mAh-11.1V-for-Dell-Studio-1737-1…

Quote:
This replacement battery is compatible with Laptops for HP. With this battery for your notebook you can get long hours of battery life without having to frequently plug-in to recharge. Long enough battery life is essential to optimizing your productivity while in meetings or traveling. Get one, you will never regret!
Features
New high quality generic Li-ion Battery
Original manufacturer compatible
No memory effect. Chargeable even if it has not been used up yet
Specifications
Condition New
Product Type Replacement Battery
Cell Type Li-ion
Cells 12
Whr 103.7
Voltage 10.8V
Capacity 9600mAh
Color Black
Compatibel With HSTNN-Q34C, HSTNN-C51C, HSTNN-C52C, HSTNN-C53C, HSTNN-W48C, HSTNN-W49C, HSTNN-W50C, HSTNN-DB72, HSTNN-DB73, HSTNN-IB72, HSTNN-IB73, HSTNN-UB73, HSTNN-CB73, HSTNN-LB72Compaq Presario CQ40 series, Compaq Presario CQ45 series, Compaq Presario CQ50 series, Compaq Presario CQ60 series, Compaq Presario CQ70 series, HP DV4 series, HP DV4-1100 series, HP DV4-1200 series, HP Pavilion DV5, HP Pavilion DV5-1000 series, HP Pavilion DV5-1100 series, HP Pavilion DV5-1200 series, HP Pavilion DV5T, DV5Z series, Hp Pavilion DV6 series, HP Pavilion DV6 series, HP Pavilion G50 series, HP Pavilion G60 series, HP Pavilion G70 series, HP G71-343US, 485

Re. flat vs. button top: I looked more closely at the pics from the OP, and those do look like flat tops.

Jim

P.S. On my purchase from Tmart, the payment went to N&K Trading_tmart, thus my “guess” that the ebay seller is tmart.com, or associated with them.

ohaya
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cat eyes wrote:well they sell

cat eyes wrote:
well they sell chinese batteries so make sure you get them cheap…
do you resell lights ???

cat eyes,

Who were you talking to/asking?

Jim

ohaya
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ohaya wrote:cat eyes

ohaya wrote:
cat eyes wrote:
well they sell chinese batteries so make sure you get them cheap…
do you resell lights ???

cat eyes,

Who were you talking to/asking?

Jim

Hi,

Oh, ok….

No, I don’t resell lights Smile.

It’s just that I’ve just gotten interested in lights fairly recently, and there’s a TON of stuff to learn about (for me).

I have a technical background, but it’s been all work, while this is actually FUN, so it’s like “a kid in a candy shop”… and, BTW, I think I’ve mentioned on other threads, my wife is already starting to hate it, because of the pile of lights, batteries, chargers, and rigamarole that I’ve accumulated in the last 1.5 months.

Jim

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ohaya

ohaya wrote:
Quote:
Compatibel

Haha, yep, same creative spelling in the ebay listing.

-----

Is there good evidence that any cells made in China are automatically 'retreads'? That's not a leading question, I'm truly asking. I know about some of the quality issues, like everybody else I got burned years ago by the Chinese capacitor scandal, but capacitors and batteries are different animals. Lots of circuits still work passably well even when some or all of the capacitors are completely ineffective... for a while, until they vent. Can they really use river water and ox dung in a LiIon cell and have it still work?

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I would dearly love to have a

I would dearly love to have a tackle box packed full of fifty Panasonic 3400's or Samsung INRs, but not so much I'd be willing to give up food to get them.

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comfychair
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These aren't HP packs,

These aren't HP packs, they're aftermarket replacements. The genuine HP-branded OEM packs use LG - at least based on the one sample I opened.

edit: The OEM 12-cell pack for the HP DV4 used LG cells... they may use something else for other and/or newer models.

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comfychair
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Nearest Home Depot is ~90

Nearest Home Depot is ~90 miles away... Sad

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cat eyes wrote:ohaya

cat eyes wrote:
ohaya wrote:
cat eyes,

What is “BAK”?

comfy chair,

Your pictures didn’t show it, but do these cells have button tops? Or are they flat tops?

Jim

BAK is a chinese battery factory….
the post above mine references magicshine and they sell BAK batteries for their bike lights…
BAK makes these batteries we are critiquing

and coming out of a laptop pack i would guess that they are flat top

Fenix 18650 has also BAK cell.
http://lygte-info.dk/review/batteries2012/Fenix%2018650%20ARB-L2%202600mAh%20%28Black%29%20UK.html

ohaya
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cat eyes wrote:oh…ok…. well

cat eyes wrote:
oh…ok….
well good luck hope you get sanyos next time…..
the black and decker battery packs at home depot
had 10 sanyos for $22 last week…..

sku 342082
on sale in store not online

They’re $89 now:

http://www.homedepot.com/p/t/203081187?catalogId=10053&langId=-1&keyword…

but not available in any stores near me :)…

Jim

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Crude but interesting

Crude but interesting results...

Solarforce S1100, 3x18650 in series, w/low batt warning that trips at 3.3v/cell. Tailcap draw is 1.22A, current delivered to the emitter is 3.3A.

All cells fresh off the charger, start voltage of 4.21V.

Samsung INR18650 15Q, runtime on HIGH: 1h08m

BAK/CJ 6K00112, runtime on HIGH: 1h30m

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ohaya
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comfychair wrote:Crude but

comfychair wrote:

Crude but interesting results…

Solarforce S1100, 3×18650 in series, w/low batt warning that trips at 3.3v/cell. Tailcap draw is 1.22A, current delivered to the emitter is 3.3A.

All cells fresh off the charger, start voltage of 4.21V.

Samsung INR18650 15Q, runtime on HIGH: 1h08m

BAK/CJ 6K00112, runtime on HIGH: 1h30m

comfy,

I’m losing track of this thread. Are the “BAK/CJ” ones you mention above the ones from the $30 laptop battery (the one I just bought Smile!)?

Jim

P.S. Are we sure that the BAK/CJ ones are actually manufactured by BAK?

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ohaya wrote:comfychair

ohaya wrote:
comfychair wrote:

Crude but interesting results...

Solarforce S1100, 3x18650 in series, w/low batt warning that trips at 3.3v/cell. Tailcap draw is 1.22A, current delivered to the emitter is 3.3A.

All cells fresh off the charger, start voltage of 4.21V.

Samsung INR18650 15Q, runtime on HIGH: 1h08m

BAK/CJ 6K00112, runtime on HIGH: 1h30m

comfy, I'm losing track of this thread. Are the "CJ" ones you mention above the ones from the $30 laptop battery (the one I just bought Smile!)? Jim

YES.

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ohaya
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Hi, I wanted to keep you

Hi,

I wanted to keep you all up-to-date. The one I ordered is now in Secaucus, NJ, on its way to me in VA. That’s the same place the orders I had from Tmart.com came through before.

The unfortunate part is that in the 2-3 orders I got from Tmart in the past, the shipments seemed to sit in Secaucus for a couple of days. Hopefully, that won’t be the case since this was purchased through Ebay, but we shall see I guess :)…

Later,
Jim

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I got mine in 6 days,

I got mine in 6 days, including a weekend, from NJ to MS. USPS is weird like that sometimes.

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marcl
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comfychair wrote:Crude but

comfychair wrote:

Crude but interesting results…

Solarforce S1100, 3×18650 in series, w/low batt warning that trips at 3.3v/cell. Tailcap draw is 1.22A, current delivered to the emitter is 3.3A.

All cells fresh off the charger, start voltage of 4.21V.

Samsung INR18650 15Q, runtime on HIGH: 1h08m

BAK/CJ 6K00112, runtime on HIGH: 1h30m

Comfy, are these good readings? I’m not familiar with this light. Also are you saying these are good cells or not? The reason I ask is because I actually want one for my HP, so it’s probably a better deal for me than anyone.

I will have to get the one in Reduk’s link of course, but I presume they are the same.

Marc.

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ohaya
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comfychair wrote:I got mine

comfychair wrote:

I got mine in 6 days, including a weekend, from NJ to MS. USPS is weird like that sometimes.

Still in Secaucus, NJ today (Tuesday)…

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