If, as is likely, they are li-ion batteries, they can't be recelled.
If they are the early NiMh batteries, they can be recelled in theory, but there are two problems. One is that the very high discharge rate flat ended untagged NiMh cells are very difficult to obtain and expensive, around £10 or more each making the cells cost £300 or more, the other is that the construction in the eZee case is a very awkward one. The cells are mounted in six vertical columns of five cells each and these have to be assembled on a jig with special double headed soldering iron. Just butting up against each other doesn't give adequate contact for the high currents involved.
Since nobody offers a recelling service for them, not a practical proposition.
Also, the charger has to be the right one for whatever battery you end up with, NiMh or Li-ion.
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