If you ever take it to Germany just be aware that the phrase 'it rides like a tank' commonly does not translate to something involving a tank. It will make sense but will carry a militaristic connotation.

Also I'm happy to see you having success with those LED replacement lights. I used to own a battery light built around 6V 3W bulbs (I.e. 5 x AA rechargeable batteries lasting a long time but very heavy. I also replaced with an LED and that light never died in winter. Unfortunately I lost it and now I'm using an LED light with integrated lithium ion battery that is much much smaller. Hold on to your solution!