Our outdoor stereo audio amplifier design requirements for battery: First the battery must be durable, second is that the current can be adjusted anytime to control volume. In this paper we use the high-performance Samsung 18650, so that the entire battery to achieve high capacity, small size, long cycle life, safe and reliable, high stability, and light weight etc.
Battery specific design ：
Cell Type and Model：Lithium 18650 2600mAh Battery
Cell Outer Dimension: Φ18.3 ±0.2mm×64.9±0.3mm (L)
By the way, we are experienced in OEM projects and are well-equipped with sophisticated production machinery to entertain every OEM order.