I purchased a Casio EX-Z75 digital camera about a year ago and for the most part it’s been working perfectly and it’s a very good camera. However, I didn’t use it for about 2 months or so and it seems the rechargeable lithium ion battery is dead (it’s a NP-20 battery). When I try to recharge it, the red light on the charger just keeps blinking. After 2 sessions of charging for several hours, I gave up. I searched online and found out a lot of people also had this problem with this camera’s battery.