Take control of your day with the versatility and performance of Jikong BMS 4S 5S 6S 7S 8S 300A Smart BMS 2A Active Balance Built-in BT APP Android IOS Parallel Connection 12V 24V 3S Jikong BMS. Smart, efficient, and built to last — an essential in any collection. Browse and buy online at Keser.pl — trusted products at great prices.