Primary competitive advantages 1. 100% Pre-delivery inspection to ensure stable quality and reliable performance. 2. Pb-Ca grid alloy battery plate, low water loss, and stable quality low self-discharge rate. 3. Low internal resistance, good high rate discharge performance. 4. Excellence high-and-low temperature performance, working temperature ranging from -25ºC to 50ºC. 5. Design float service life: 5-7 years.