I've had my computer for about a year, got the low batt sign on tuesday on a group ride, open it up replace it and make sure the o-ring is seated properly, and now the computer will randomly turn off almost as if the battery isn't making contact or something...

yesterday it was perfect on the ride...today it reset 3x on the ride...this is getting old real quick, anyone have any clue what's wrong?

I bought it from performance...how are they on returns/exchanges?