APC back-ups cs 650

[DaniP]

Hello,

I have a problem with APC CS 650. Green light(on line) keeps blinking for few seconds, then the UPS shuts down. The battery is brand new and original for the APC CS 650. When I put in one old baterry, the red light blinks, but UPS works normal, it beeps but at least it works. 

Thanks for the help

Dani

[HaSch]

I have the same problem. Isn't there a solution?

[HaSch]

My problem isn't exactly the same but nearly. On my device the green LED is always flashing no matter what battery is used. After 10 seconds the device is going off!