How did the old Dinotte 400R compare with the Daytime Red? I've been using the 400R for 12 years now and I remember thinking when I got it that it worked well as a day time light. I must be an oddball in that I like the external battery rather than integrated. I leave the 400R on the bike and carry the battery in the always-present pannier. The pannier goes into the house with me and so does the battery without any thought, to warm up for the next ride/get recharged when needed/etc