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Chilwee BG (BLACK GOLD) Series high energy VRLA Battery is specially designed based on Graphene Technology, which has obviously improve the battery's capacity, output power, cycle life and high/low temperature performance. The Chilwee BG (BLACK GOLD) Series provides longer range, larger power and extremely long life for motive power applications, i.e. electric bicycles, electric tricycles, electric motorcycles and other device require DC power source.
link:https://www.chilweebattery.com/motive-power-battery/electric-vehicle-lead-acid-battery/6-dzf-13-12v-chilwee-black-gold-battery.html
6-DZF-13 12V VRLA BATTERY