SIZE: 3.5 x 2.3 INCH Optimize the battery, extend battery life upto 3 times longer or 8-10 years, or repair used battery. SIZE: 3.5 x 2.3 INCHFeatures:1. Optimize the battery, extend battery life upto 3 times longer or 8-10 years, eliminating the chances of vehicles stalling on roads;2. Keep battery in "like-new" status, and bring the old or used batteries back to life;3. Enhance the vehicle ...