The manual says it does. It has all the symptoms of a dying backup lithium battery as the manual discribed (LCD screen blinking rapidly when camera is turned on, then it switches off). It does that even with new AAA batteries. This camera has not been in use for quite some time. So, is it that the backup battery is dying, or is it that it ran out of charge for not being in use for a long time and that it will get recharged after I start using it because it takes its power from the AAA batteries?