Minelab Etrac/Explorer li ion power system

[Turboair]

Ok, now I woud like to study this mod.
I would like to maintain the original battery holder and add in some lighter and powerful li-ion batteries.
What about 3 18650 cells (unprotected) with 11.1V PCB? The only problem is that with a diameter of 18mm will be hard to get them fit in the holder.
Something like this:





Any other idea?
Thank You.

[Turboair]

Ok,
I made some progresses with my experiment.
I created the base to place my three 18650, get the PCB delivered, made the contacts (to the detector) and mounted them temporarely.
To gain space I had to cut the base and insert batteries...















I will add some balancing wire following the scheme I found on this forum.



I guess that wires that go to balancing will be soldered to the PCB, any can confirm?

I will use an IMAX b6 to balance/charging the pack...

[Turboair]

Ok. Mission accomplished.
I connected PCB to the batteries following the (PCB) producer scheme and balance leads to the batteries following the above scheme I found on this forum.
It fits well and works flawlessy. Now I have a nominal 3400 (mah) li ion system for my FBS detectors...
Here are some shots:
Battery pack finished



Contacts


It fits well and stay in place. In this shot my Expl II is turned on. I removed the battery cap just to not brake it during my tests...but now it is in place.


During charge on a IMAX B6AC


Cells balancing

[satdaveuk]

Thats a handy modification, how much longer do you expect out of the batterys?
I got the Quattro same battery set up as yours

Regards

[Turboair]

Thats a handy modification, how much longer do you expect out of the batterys?
I got the Quattro same battery set up as yours

Regards

Hi,I do not know how many mah my FBS absorb, but I guess not less than 30 h with headphones.
Regards,