I did have it connected at my work desktop during the work day sometimes, but I wouldn't consider it desktop mode as in permanently charging and connected to speakers or anything like that. I just considered it charging before the return trip home. Your suggestions are interesting. It probably won't be useful to me, but it might mean that it still has some value to someone who do not want to use it as a portable unit then? There is a bit of a conflict in your statements though. Can it be used as desktop unit directly without any battery or other modifications? Does it become more sensitive to ripple w/o the battery and thus requires a really expensive 5V source or would any USB charger I have used in the past work?@CJG888 Has someone checked how high the peak powerdraw can get? I may end up going the other route, but if not, I would still appreaciate if you would be so kind as to opening it again and try to get measurements of the battery. If not for me, then maybe for someone else. The links I posted to hobbyking above seemed promising size-wise and are availible to both EU and US. If we can find one battery which fits the Mojo, this might be useful info to other Mojo users when they encounter a similar fate.