fitting a new lithium battery to an old original minelab sovereign

[keith777]

Hi guys.

i have just acquired an old original minelab sovereign machine. i payed 40 UK Pounds for it including the coil and shaft. the seller didn't know if it was working or not as they didn't have a battery for it. well i had one of these 12volt lithium batteries that is in the photos laying about. so i tested it with that. luckily the machine was working which was a big bonus. i though i will us this battery for it as it is a perfect size for it. but when i went to put the battery cover on. i found that the battery is about 2mm to 3mm just to thick in height for the cover to fit on over the battery.

i was wondering if anyone has ever taken one of these batteries apart to see what they are like inside. has anyone any photos of one opened up. so i can see if it is worth taking mine apart to shrink it to fit better. or even safe to take it apart.
many thanks in advance......

[waltr]

LiPo battery are in a foil pouch. Since that is ~12V means it is a 3S (3 cells).

I've never seen a LiPo in the type of case but it may be possible to remove the case. Just be VERY CAREFUL not to puncture the foil.

[kt315]

LiPo battery are in a foil pouch. Since that is ~12V means it is a 3S (3 cells).

I've never seen a LiPo in the type of case but it may be possible to remove the case. Just be VERY CAREFUL not to puncture the foil.

i use a converter STEP UP, 1-2pcs 18650 batt(s).

[lamoiz]

hi, for this xs a2 device, i made a 3s 18650 3000mha battery and a 3s bms.. it works perfectly for 20hrs..

[waltr]

On second though, that battery pack could be 18650 cells like kt315 mentions.

[kt315]

i can put away one sell, they are parallely connected.

[lamoiz]

with that in addition, for the safety of the elements in charge and unloading.

[kt315]

i do not use same board. no need. for charge i bought cheapest charger, opened it and solder a wire with connector.

[lamoiz]

it is true that it is not necessary, but in the long run, the elements are unbalanced, and their lifespan decreases, as well as their capacity. Some BMS charge in balance, and preserve the balance in discharge. the 18650 explodes copiously in case of overcharge beyond the voltage 4.8v..
I made the same board as for the battery adapter, and installed 3 x 18650. plus bms. It works very well .

[kt315]

it is true that it is not necessary, but in the long run, the elements are unbalanced, and their lifespan decreases, as well as their capacity. Some BMS charge in balance, and preserve the balance in discharge. the 18650 explodes copiously in case of overcharge beyond the voltage 4.8v..
I made the same board as for the battery adapter, and installed 3 x 18650. plus bms. It works very well .

[ATTACH]57828[/ATTACH][ATTACH]57829[/ATTACH][ATTACH]57830[/ATTACH]

i use a converter. it gives 12V from 3.6V.

[kt315]

it is true that it is not necessary, but in the long run, the elements are unbalanced, and their lifespan decreases, as well as their capacity. Some BMS charge in balance, and preserve the balance in discharge. the 18650 explodes copiously in case of overcharge beyond the voltage 4.8v..
I made the same board as for the battery adapter, and installed 3 x 18650. plus bms. It works very well .

[ATTACH]57828[/ATTACH][ATTACH]57829[/ATTACH][ATTACH]57830[/ATTACH]

i use a converter. it gives 12V from 3.6V.

[lamoiz]

yes, I do it too, on my IDX or on the nano, I installed 2 *18650. with 7.4v to 12.5v converter. I did the test with only 1 element, it works, but you have to be careful not to go too low in voltage at the risk of destroying the battery..
anyway, the question of opening a bag with a lipo is possible, but be very careful not to cut the envelope of the elements. the risk of fire is very very probable.

[kt315]

for 2...3...4 cells especial protected board is needed. i connected two cells in parallel. also i noticed
a charging of paralel cells is normal way for liion. i opened power banks and see the connection.

[kt315]

E71 will give you a circuit... his site. http://eddy71.ucoz.net/publ/prostoj_...orov/1-1-0-101

[lamoiz]

for 2...3...4 cells especial protected board is needed. i connected two cells in parallel. also i noticed
a charging of paralel cells is normal way for liion. i opened power banks and see the connection.

Yes of course