I had the same problem , my psp 3004 was not detecting the battery, and the solution I found on internet was to change de 3.3v 0.2f condenser. This is the reference of the one I bought on aliexpress in case it expires: Condensador Super Farad, SMD, 3,3 V, 0.2f, DSK-3R3K204T614 https://es.aliexpress.com/item/100500460...