Vinatech manufactures Hybrid supercapacitor for your Solar lights to be used instead of batteries, such as solar road marker/stud, solar house number, solar traffic sign etc.This is not a battery: Hybrid supercapacitor has twice more energy than existing supercapacitors(EDLC) and higher power density than batteries.Hybrid capacitor is of tens of thousand cycle life and tolerant to severer temperature(-25C to +70C) with maintenance-free over 10 years.Furthermore, Hy-cap uses no toxic material like lead-acid/Nicd batteries, whose concept should be perfectly matched with your environment-friendly products.As you know about RoHS regulation, EU market will limit light & electric products containing hazardous materials such as Cd(Nicd battery), and Pb(Lead battery) from July 1st,2006.For your reference, I've attached two ralated files. I would like you to review & consider applying Hybrid supercaps to your solar products.I believe Hy-cap will benefit you by resolving battery's problems like