... upto 3 times longer or 8-10 years, or repair used battery. SIZE: 3.5 x 2.3 INCHFeatures:1. ... on roads;2. Keep battery in "like-new" status, and bring the old or used batteries back to life;3 ... only applicable to vehicles, but also to all appliances using lead acid battery, like UPS power supply, boat, yacht, solar lamp, ... car drivers when they come for periodic maintenance. Lead Acid Battery Optimizer