I am planning to add a second battery to the rear of my car, in parallel with the starting battery, to help with the stereo. I was going to add the Odyssey ER30 because it is the perfect size for my space, but they said I cant because the charging characteristics are too different from my starting battery.
My starting battery is a group size 94R, Motomaster Eliminator (Canadian Tire) and it does not have the six screw caps for water on it but has a small circular window within which you can see green. I'd change it but the starting batt is new with 9 yr warranty, and it wasn't cheap. I will try and find out the manufacturer, but in the meantime can anyone recommend a small battery for the rear for my application? Looking for 20aH+, not higher than 6 1/4" including terminals. I have some length and width restrictions too but not sure, biggest restriction is height.
Thanks in advance!