Failing at this step could damage your device. Having said that, if you lack the tools you could gamble with that risk and proceed without checking the compatibility.

The battery connectors are not common between brands so you will probably need to cut the cables and soldering them after. Being a destructive process, we will make sure that the replacement has the correct polarity. Trusting the coloring of the cables does not guarantee the proper connectivity.

We will cut the cables from the old battery, giving plenty of room so we can work with it easier while soldering. Then we will measure the voltage of the old and new battery taking the same reference points (black as ground in the example) and check that the have the same polarity.

The voltage will differ because of the difference in charge. We are looking at the sign, if one measurement is negative and the other is positive, that means the colors are inverted and we will have to solder them reversed too.