4dtv battery replacement?

[hotrodman]

I have a G/I model 920 4dtv receiver which is currently working fine. But I would like to change the intermal bettery in it before I have trouble . Can I do it myself without loosing the memory? and where can I get instructions? and find the battery number and battery . Need help thanks

 

[joe harr]

Hello i am in the same boat need to find some one in AZ to change the battery in my 920 also. need help too. joe