Camcorder SONY HDR-CX 240E

Hello, I have just received 4 for a camcorder Sony HDR-CX 240E, I tested the 4 batteries on a first charge on a recording mode, about 2:05 / 2:15 Energy against just about 15/20 minutes to the Sony batteries, small feature to specify and which is also included on the packaging incription the graduated bar remaining energy (battery) that is displayed on the device screen does not work with this type of batteries ... (the bar remains full) it is also for this reason that I have tested the 4 because the watch will be the only point of graduation .... to see the evolution over time .....