I have a Lupine Wima front light with a Lupine 6.8Amp-Hr battery. I'd like to get a Dinotte 400R tail light and power it from the Lupine battery (using one battery to power two lights)--the Lupine charging system is excellent has enough capacity to power two lights. The 400R is normally powered by a lithium battery and has a voltage cut off of 6v.

Do you see any problems with proceeding with this kind of setup?