1915 and 1916 Harley Davidson twins w sidecars in Omaha

Just got this reprint of a 1915 electric model twin and a 1916 electric model. Checkout the long axle on the left side 1915 bike, the flat tanker on the left is 1915 and on the right a 1916 w curved corner tanks,. In all my yrs w old bikes i have never ever seen a 1915-16 era battery.
Great old foto, no helmets here. Great old iron. You can just barely see the little lunchbox on the top of the 1915, it probably had an Amp gauge on the top too. It wasnt really for carrying sandwiches! I'm just screwing w you. tools, plugs ,service manual...