I think the only solution is to cut and solder the cables from the battery
(the one coming with the lipo 501865 inside) one by one onto the MPX connector of the old battery.
Just in case, I also purchased a pair of MPX connectors (male and female) along with the lipo battery.
Since it is a charged battery, I will have to be very careful and cut and solder (inserting the heat-shrink tubing one at a time) all 6 cables (4 for charge balancing, the positive and the negative).
In your opinion, could the higher milliamps of the battery I am going to use (from 900mA to 1800mA) be a problem for the proper functioning of the DR200?
Considering that the same chip is used on other boxes, even with the help of 3 18650s,
I don't think there should be any problems.
It should also be noted that other boxes with the same chip use a 1400mh lipo battery by default.
In any case, and for the future, if anyone finds the original battery for sale
with an MPX connector, or a similar battery that can be shipped to Italy, please let me know.
Thank you.