I dug out my camcorder (Sony PC5) after a period of six months or so and proceeded to charge up both my NP-FS21 Li-ion batteries. I let them charge an hour or so after the orange light had gone out on the charger. Took the camera out for some filming at the local sailing club. The battery life indicator was showing about 120 mins with the screen on. After about 10 minutes, the indicator shot down to empty, the low battery warning came on and the camera died. I replaced the battery with my other fully-charged battery and exactly the same thing happened after about 5 minutes this time. I cleaned the batter/camera contacts with contact cleaner, but it didn't help. I also fitted both batteries to my car charger (Sony DC-VQ11) which shows over 2 hours life for each battery on its display. Fitted then back on the camera with the same results. Battery life indicator down to zero after a few minutes. I can only imagine the batteries have died, but is this normal after about three years? Many thanks for any advice.