should new battery replacement for iPhone5 already have power

chris meadows, "only problem is i have no usb or wall charger as friend mistakenly took mines do i need to charge new battery first" eventually you will need to charge it somehow. So you may need to invest in a new charger/cable. Second you need to clean the logic board carefully. You said that it was water damaged, but did not tell us about any corrosion. I suggest that you disassemble your phone, using this guide. Get some isopropyl alcohol (90%) and clean the board and all the connectors with a soft toothbrush. Check for any burned, missing or otherwise damaged looking components. Take your time with that and use some sort of magnifier. You may have to clean the board a few times, depending on the corrosion, debris etc. After that reinstall and see what you get. Hope this helps, good luck.