and it looks great. It is replacing the worn out Digital night owl battery. I followed Metroid's FAQ's about lighting systems, and it looks good. Changed the config to a flat pack, to fit better in my jersey pocket. As soon as I track down a soldering iron, I am in business. Photos and a performance review to follow. BTW, cost for 5 4500mah batteries (6V total) wired in sequence, and zapped (shrink wrapped), with shipping, $40.75. The NR pack that it replaces is $89.00 in the one catalog I have right now.The batteries are EXACTLY the same, without the NR plug. (already have that.) Later.