We present two novel design modifications to the basic entrochemical system which enable the generation of an entrochemical thermal battery. The inclusion of a passive mixing mechanism enables the continual disruption of the water layer that forms at the top of the saline solutions, enhancing the overall thermal gradient. Embedding of one cell’s cool side in the previous cell’s warm side allows efficient conduction of thermal energy between the two, effectively driving the additive property of the overall thermal gradient, the battery effect. We demonstrate that the passive mixing mechanism enhances performance, generating a one-cell gradient of 18.3 ± 0.3◦C rather than a non-mixed gradient of 10.3 ± 1.5◦ C. Using the battery effect, we are able to obtain a three-cell thermal gradient of 40.2 ± 0.3◦ C. Using the current uninsulated chambers, a projected asymptotic thermal gradient of 64.71◦C is determined for many independent cells.