not disagreeing with you either :) The killer feature of lead acid designs is cost and availability. In many applications, they are significantly cheaper. The

not disagreeing with you either :) The killer feature of lead acid designs is cost and availability. In many applications, they are significantly cheaper. The chance cycle issue is real and i’m glad you brought that up. For some applications, they make sense. One is a low power draw solar-powered website. Lead acid batteries also outlast most lithium chemistries by several years. These batteries have been around for decades now are are absolutely everywhere and the voltages are standardized. that alone is a significant advantage. Case in point - i run a UPS using my old 12 V car battery. Granted, i cannot keep this indoors but it works well. Similar to what you said - off-grid or backup power is the mainstay of lead acid designs. almost every electrical substation out there uses lead acid for backup power.