My remotes signal is getting very weak and sometimes doesn't work, so I figured it probably needs a new battery. At first I thought this would be easy but when I opened it up, the battery was concealed in a plastic box and I don't know how to get into it and it seems to be pretty tight in there. I don't want to risk breaking it because I'm sure it would be very difficult to find a new one. The owners manual was of no use as it just says to consult a Daihatsu dealer, which for obvious reasons, is quite impossible... Anyone replaced the battery themselves before and know how to get into it without damaging anything?