11-30-2018, 03:51 AM
Add to your research the Optima battery. I suspect they would have a high power to weight ratio because they are a common choice in helicopters. They are available in Deep Cycle and quite common in automotive parts stores.
https://www.optimabatteries.com/en-us/te...gI_EvD_BwE
Ronald
https://www.optimabatteries.com/en-us/te...gI_EvD_BwE
Ronald
