Have been toying with the idea of trying out a Hugo 2 with my NDX but, living in NZ, threads like this concern me. Would the local agents Rappalo AV be able to replace the battery and if so, would they do so free of charge? Or would it need to be returned to the UK? In which case I would probably have to cover shipping costs etc...
There has been some indication that the problem may have been confined to the earlier production of Hugo, though I don't know that we have enough info to be definitive. And of course it is likely to have been something Chord will have been concerned about themselves when revising the device.
Why not speak to your local distributor to find out if they do any servicing or repair themselves, and if that extends to battery replacement in the event of failure. Also worth contacting Chord themselves direct and asking about the battery given the history with the original Hugo, and see what they have to say.
Otherwise if you still feel it is too much of an issue there is 2Qute, as BtB has mentioned, though it is reputed not to sound quite as good as H1, and certainly not as good as H2 (unless they produce a 2Q2 in due course). There is alsoHugo TT, though it is a lot more expensive and perhaps not better sounding as it was only slightly better than H1 - whether that will now come down in price at all, or also be improved, of course are also unknown factors.