Redlight: common batteries, low value and easy to manufacture, but of low quality and mAh, and slow charging. Gold: Common, more durable batteries with high mAh performance, cost-effectiveness, and medium ease of manufacture, and fast charging (used in sports car projects) BlackLith: batteries with maximum performance power, ultra high mAh durability, and switch system that provides optimal energy savings, ultra fast charging, yet high cost of purchase and manufacture.