I have the very issue right now. However, the alarm still sirens so for the cost of replacement, I think I will leave it for now. I believe the back up battery is there if the main battery is removed from the car? If so... dont think my car will be pinched and that even happening. But yes... some cost for a small unit!
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2012 Volvo XC70 3.0L AWD T6 [CAN🍁]
2015 Volvo XC70 2.4L AWD D4 SE LUX - Sold 78,728 Miles (July 2023) [GB]
2012 Volvo XC70 2.4L AWD D3 SE LUX - Written off 76,500 Miles (Aug 2017)[GB]
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