Comments about Lenmar Lenmar No Memory Rechargeable Lith-ion Battery for the Sony NP-FX1 DVD Player, 7.4v. 6800mAh:
After charging this battery fully I attempted to run it down. It actually took me a couple of days to run it down because I wanted to keep a strict accounting of the time but the charge lasted a cumulative time of 5 hours and 25 minutes! I don't remember the original battery lasting long. This seems to be a good buy but I've only had it for a month so time will tell what the longevity of this will be.