please forgive a newbie if this has been asked before. My battery on my nissan almera 1.8 sport is low (still enough power for heater fan, central locking etc). I believe that if i remove my battery for charging i will have to try and find and re-input my radio code, so therefore my question is, do i do this or would i be better just getting a jump start, my battery is only low i assume because of the cold weather and with me being hospital it has not been started in a while. Again apoligies if this has already been asked and assistance appreciated.