Question about changing the internal battery of a FM Towns Marty 2

[StealthLurker]

Hi, has anyone had any experience with changing the internal battery of an FM Towns Marty 2 console? It appears to be soldered down at the top.

If you guys have any tips it would be greatly appreciated. Thanks for your time.

.

 

[Xian Xi]

Desolder the 2 posts on the bottom to remove the battery.