Just cracked my dead laptop battery and found 12x 18650's, what to do with it??

[apuck]

I may not be a bright man, but I know a bad idea when I hear one... Using those old laptop batteries sounds crazy to me. Too many unknowns it just seems risky, especially when you can get good trusted reliable batteries for so darned cheap (charger too for that matter).

 

[delchrys]

maybe i can try and make use of my 14650 ego-t battery with broken mosfet. i only use battery and a switch in a box, and mod it to 4,2v box mod, a simple version only for testing at higher voltage.

i'll throw the 18650 laptop batteries over board and get some new, when i like higher voltage

 

[Sicarius]

Why not build a test mod with NiMh.

4.8V vaping and parts will be available I am certain.

 

[delchrys]

hmmmm, also great idea, so only 4 d-cells and a switch, old battery connector from my dead ego, and off we go....
so i have 4,2V off charger with my ego batt, and 3,6 with 3 d-cells or 4,8 with 4 cells.
almost VV

 

[Rocketman]

Search in the Mod section for

The Puck.
a NiMh 4 cell mod.

Better than old unprotected Li-ion cells any day.


Start at the first post
http://www.e-cigarette-forum.com/forum/battery-mods/105465-now-puck-cheap-parts-easy.html

 

[Traver]

Then discharge with lightbulbs and recharged to race again

Why the extra discharge?

 

[AttyPops]

Look. We've had posts about exploding stacked batteries before. We've said only use protected batteries... or a mod with a protection circuit.

Since you asked about stacking them and using a resistor to get 5 volts... you haven't read enough about modding nor batteries.

2 14500's are about $10.00 - $15.00 USD. Get them, a charger, and a REGULATOR... and build a nice safe box mod. Or get two PROTECTED 18650's or some IMR batteries. Don't skip the protection circuit. And I wouldn't use old batteries either. And I'm broke. So.... be safe dude.

 

[delchrys]

For the discharging, when i raced i did'n race until my batts were fully discharged, do i had an bulb discharger to discharge. I also made an discharging device which automatically discharged through 0.9V per cell. To keep batts balanced and in shape. I must say it worked pretty well.

I will do everything safe, but this is just for testing at higher voltage, don't even know if i like it..
I think i go for the 3/4 NiMH mod, i will only use AA types, have plenty of them

 

[Traver]

To keep batts balanced and in shape. I must say it worked pretty well.

My understanding is that there is no reason to discharge a lithium battery they don't have a memory. When stacking you do need to charge them to the same voltage. I'm not a battery expert so I was wondering what the reason for it was.
What voltage do you discharge them to?

 

[delchrys]

The discharging was for NiMh and NiCd's not for Li-ion.

 

[Baldr]

Throw the batteries away, and buy a lavatube.