Li-Ion Battery Packs

[jamesfuss]

will these batteries be okay to do this with and work properly on a petit crouton V3.%?
http://www.jaycar.com.au/productView.asp?ID=SB2403

[Forgetful Jedi Knight]

will these batteries be okay to do this with and work properly on a petit crouton V3.%?
http://www.jaycar.com.au/productView.asp?ID=SB2403

You would need a 7.4V pack, unless you are doing the 3.7V hack on the PC.

[jamesfuss]

I mean to use two of those batteries connected to a pcb to get the 7.4v, just wondering if those batteries are okay to do so with

[Forgetful Jedi Knight]

As long as they are unprotected (no PCB built into the individual cell) cells they are.

[TheMCP]

Hello, greetings from Austria!

I have a question:
When i build a 3,7V pack with two parallel 18650, i should only use one pcb.
If i buy two 3,7V 3400mAh Panasonic with PCB build in, can i use one of the build in PCB's? (remove PCB's, wire the two unprotected cells together in parallel on one of the removed PCB).
Or do i need a special PCB?

Tom

[Madcow]

Hello, greetings from Austria!

I have a question:
When i build a 3,7V pack with two parallel 18650, i should only use one pcb.
If i buy two 3,7V 3400mAh Panasonic with PCB build in, can i use one of the build in PCB's? (remove PCB's, wire the two unprotected cells together in parallel on one of the removed PCB).
Or do i need a special PCB?

Tom

No sure why you would want to put them in parallel... You want a pack that has 3.7 volts and almost 7000 mAh? I would simply use one protected cell - done.
If you really want to wire in two cells parallel, you would need a special PCB I think.

[iainm]

Your 7.4V packs range between 800 and 1400 mAh. When buying a 7.4V pack how should I choose which mAh value to use? Does it all depend on what else is going into the saber apart from the LED? More stuff requires a higher mAh value perhaps? Thanks.

[Generic Jedi]

You want the most mAh possible in a battery pack that will fit in your saber. The more mAh, the longer your saber will run.

[MandoPyrate]

I have a question about the PCB use. Could you use an external DC power source to recharge your Li-ion batteries with the recharging/protecting circuit managing the charge? Say, with an external battery pack to recharge an internal battery pack in a saber.

[Remulos]

So am I to take this as 2 protected cells (same batch, full charge, etc) in series requires nothing more than:

[Recharge Port -] to [+battery 1 -] to [+ battery 2 -] to [Recharge Port +] ??