My "TIP"is to buy your battery from Costco. They are of decent quality and have a good no hassle 100 month warranty. I think the recommended interval is 5 years for replacement now, and I just returned my 4 year old Costco Kirkland battery that had signs of boiling, and didn't have any issues. Got 50% of the value back towards a new one (Prorated)
Ren
My Heatware
My Heatware