Alternative Approach

[thedore]

There is another way to limit the current draw. This is to use the non linear characteristic of light bulbs. The problem is that to get the 20 amps you need 8 dual filament automotive headlight bulbs. This provides 16 filaments in parallel. The entire set is put in series with the cell.

4 cells in series 1LPM 20% millage gain with 97 Saab.