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Old 09-09-2011, 09:27 AM #17
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Default Re: How to get "free" 18650 batteries

@BShanahan14rulz verry good explonation / info + rep


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200mw 650nm < gave it away
1mw 632.8 nm HeNe
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COHERENT INNOVA 90-5 GOD's power
MELLES GRIOT HeNe 75 mW max , 632.8 nm ( 38 mW )
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Old 09-09-2011, 11:12 AM #18
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Default Re: How to get "free" 18650 batteries

nice tut, have a look here:

Tutorial: Laptop Battery Pack 18650 Extraction

plenty of warnings that you should take note of!

Craig
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Old 09-09-2011, 02:02 PM #19
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Default Re: How to get "free" 18650 batteries

Good find and yes true about to be carefull opening those batterie packs cause those cells ofcource do have a lot of energie.
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200mw 650nm < gave it away
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COHERENT INNOVA 90-5 GOD's power
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Old 09-09-2011, 03:33 PM #20
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Default Re: How to get "free" 18650 batteries

@weeba2kv

Can I borrow that awesome picture of yours to plug into my sales thread please?

My beams do look like that with smoke, but shitty cell phone camera refuses to pick it up
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Old 09-09-2011, 03:36 PM #21
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Default Re: How to get "free" 18650 batteries

just popped open one of my mates old laptop batteries, the cells in it look exactly like my sanyo 2600mAh's!

Also had a dvd burner and the red diode is running nicely.

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405nm - 1,910mW (6)
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Old 09-09-2011, 03:41 PM #22
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Default Re: How to get "free" 18650 batteries

@ InfinitusEquitas sure you can i can make a better pic if you like ?

@ Fiddy that is great news
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Working lasers are.
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cute 5mw 532nm < my cat ate it
200mw 650nm < gave it away
1mw 632.8 nm HeNe
1.2-1.4watt 445nm

COHERENT INNOVA 90-5 GOD's power
MELLES GRIOT HeNe 75 mW max , 632.8 nm ( 38 mW )

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Old 09-09-2011, 03:48 PM #23
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Default Re: How to get "free" 18650 batteries

Quote:
Originally Posted by Fiddy View Post
Whatever else there is to the story... there is no denying he was funny on two and half men.... I can relate to a whoring alcoholic very well for some reason

Quote:
Originally Posted by weeba2kv View Post
@ InfinitusEquitas sure you can i can make a better pic if you like ?
Nah, that one is good enough, just my beamshots - no smoke - came out looking like crap: http://laserpointerforums.com/f39/fs...rch-66964.html
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Old 09-09-2011, 03:51 PM #24
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Default Re: How to get "free" 18650 batteries

Quote:
Originally Posted by weeba2kv View Post
@ Fiddy that is great news
yeah, hope they are in the ball park of my new 18650's
will be doing some internal resistance checks on 6 of them.

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Whatever else there is to the story... there is no denying he was funny on two and half men.... I can relate to a whoring alcoholic very well for some reason
haha yep!
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637nm - 5105mW (8)
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Old 09-10-2011, 02:56 AM #25
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Default Re: How to get "free" 18650 batteries

Laptop Battery (look alike to the Sanyo 2600mAh's)

1.
V1=4.103 VDC No Load
V2=3.093 VDC Loaded
R = 99.4 ohms
Internal resistance : 242 mOhms

2.
V1=4.080 VDC No Load
V2=3.072 VDC Loaded
R = 99.4 ohms
Internal resistance : 195 mOhms

3.
V1=4.080 VDC No Load
V2=4.071 VDC Loaded
R = 99.4 ohms
Internal resistance : 219 mOhms

4.
V1=4.070 VDC No Load
V2=4.062 VDC Loaded
R = 99.4 ohms
Internal resistance : 195 mOhms

5.
V1=4.082 VDC No Load
V2=4.074 VDC Loaded
R = 99.4 ohms
Internal resistance : 195 mOhms

6.
V1=4.105 VDC No Load
V2=4.097 VDC Loaded
R = 99.4 ohms
Internal resistance : 194 mOhms

According to Battery Testing Experts

75-150 mOhm - Excellent
150-250 mOhm - Good
250-350 mOhm - Marginal
350-Up mOhm - Bad
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Old 09-10-2011, 06:05 PM #26
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Default Re: How to get "free" 18650 batteries

Im going to check mine aswel
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200mw 650nm < gave it away
1mw 632.8 nm HeNe
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COHERENT INNOVA 90-5 GOD's power
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Old 09-12-2011, 06:15 PM #27
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Default Re: How to get "free" 18650 batteries

another good test to do is charge them full and let them sit for a week or so. If any of them lose voltage much faster than the others, it is likely bad.
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Old 09-12-2011, 06:48 PM #28
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Default Re: How to get "free" 18650 batteries

I was charging them up but i putted the charger in my steel oven lol
( as protection for an explotion )

But yes "lose voltage" is a good indicator for bad cells.
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cute 5mw 532nm < my cat ate it
200mw 650nm < gave it away
1mw 632.8 nm HeNe
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COHERENT INNOVA 90-5 GOD's power
MELLES GRIOT HeNe 75 mW max , 632.8 nm ( 38 mW )
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Old 10-15-2011, 07:55 PM #29
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Default Re: How to get "free" 18650 batteries

Here are 8 18650s that I just got out of an old HP 398876-001 laptop battery that was laying around.





Next to my lazerer mini 50mw.


Compared to the 16340 the 50mw uses. Anyone know the brand of the 18650?

I'm charging one up right now to see if they are any good.

Last edited by mstr; 10-15-2011 at 07:56 PM.
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Old 10-15-2011, 08:09 PM #30
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Default Re: How to get "free" 18650 batteries

nice job
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Working lasers are.
400mw 532nm < dead
cute 5mw 532nm < my cat ate it
200mw 650nm < gave it away
1mw 632.8 nm HeNe
1.2-1.4watt 445nm

COHERENT INNOVA 90-5 GOD's power
MELLES GRIOT HeNe 75 mW max , 632.8 nm ( 38 mW )
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Old 10-17-2011, 05:41 PM #31
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Default Re: How to get "free" 18650 batteries

calculated ~2400mAh 3.7V LG 18650, not sure of the particular model.

Based off specs 53.28Wh 11.1V found elsewhere.
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Old 10-18-2011, 03:21 AM #32
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Default Re: How to get "free" 18650 batteries

Hmm. After a quick voltage test I found 4 good and 4 bad. Now I just need to find a use for them.

These are protected aren't they?
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