I would like to add a rechargeable battery circuit to my G80 controlled device. I need the battery pack to be able to run the main 5V line. Total 60 mA current draw. I intend to link two of these 3.7V / 2.2Ah Lithium-Ion batteries in series to give me 7.4V. Thinking of charging this off a 9V AC/DC wall adapter but am having trouble finding an IC for this cell voltage + battery pack voltage…maybe I am just misunderstanding what the IC specs are referring to by “Battery Pack Voltage.” Does that voltage have to be an exact match or can an IC rated for 12V charge a lower voltage battery pack? It also seems most IC’s are for charging cells above 4V
Is the 3.7V rating of the cells I am looking at just the average voltage? Will they work with a charging IC rated 4V per cell?