BACKGROUND Mobile ZTE Blade V7 that got wet in the sea, it is dismantled, it is put in rice, the contacts are already cleaned with alcohol. This happened in summer and until last week running smoothly. INCIDENT Last week the phone falls to the ground without a case and a corner of the glass is broken, which makes the touch go crazy. I stopped downloading the phone since it was not going to be used until a new screen arrived that I requested. THE PROBLEM The day before yesterday I put it to charge to have it charged when the replacement screen arrived and it does not load. It puts 0%, vibrates and restarts, and again, 0%, vibrates and restarts, so in a loop. ANALYSIS With the multimeter I try the terminals of the connector on the board where it connects the battery and it gives me 3.95 V, apparently fine. TESTS To a USB cable I cut the connector that does not go to the PC, I soldered a pin to the red cable and another to the black one. I put the red to the positive of the battery and the black to the negative. In 5 minutes he charged me 4%. I connect it back to the board but it still doesn't load, although I left it overnight and it doesn't go down by 4% THE DOUBT OPINIONS Following what has been said and done, I think it is the battery, but I am not sure. I can ask for a battery that is 10 euros, I am not going to ruin, but on the other hand I would spend 10 euros and it would be circuit problem of the cell phone for getting wet a while ago. Let's see what opinion you have as a result of the above and / or what suggestions for more tests you can give me. Thanks in advance.

the safest thing is that you need full cleaning of the logic of the equipment afterwards you would have to apply heat to the integrated load and to the eye memories only to those integrated not to the processor because you would have a nice footprint

You are right. I bought a new battery and did not charge either, although connected did not lose charge. Remove the entire plate below where the charging connector goes and clean it with a stick and normal alcohol.I dried it and it already loads although I think a little slower than it should (5 hours and a half of 3% at full load) . As I will have to disassemble everything to change the screen, I will use to buy isopropanol and clean all the circuitry more thoroughly. Closed topic. Thanks to everyone for the collaboration.