basically, a 2x2 part that you can stick multiple batterys in to combine them to make 1 battery that lasts longer then a regular one,
i suppose it could be used for things that run out of power fast like: ions, mining lasers, boost thrusters and the MRS.
for conversion with different reactors it would go something like:
6 small reactor battery's,
3 medium reactor battery's
2 large reactor battery's
(because dividable number or something)
basically it needs 6 battery's, it eats one and uses the power to fuse the other 5 into an [cell] that has the power of 5 separate battery's combined,
example: an ion has 10 battery's, it uses 1.25 power/sec witch means it takes 8 seconds to drain,
with the [cell] it goes up to 50, and takes.... 40 seconds?!....

