Hi jrs, the problem of reduced performance under freezing point is one they might have solved already... remember the recent news?
Hint ->
mPhase Technologies Granted Key U.S. Patent for Multi-Chemistry Battery Architecture
...
The concepts behind the patent could be used to create a new type of reserve battery that would work in a wide range of applications, such as electronic devices and sensors used in very high and low temperature environments, where the temperature conditions may change over time, or in other environments where optimal battery performance is not easily achieved based on a single non optimized battery chemistry.
It is clear that folks at XDSL are working hard on finishing the car battery while doing a bunch of other things...
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