Upgrade Energy Dark Lithium 4S 4100mAh Li-Ion Battery

Upgrade Energy Dark Lithium series is the new product line designed to dominate the long-range FPV market. With a higher capacity, lower internal resistance, and a lower pack temperature, this battery will provide flight times and punch like no other battery on the market. Through extensive research and lab testing, Upgrade Energy has built the best Li-Ion pack.

Features  

• High quality, long-lasting power designed and made in the USA
• Utilizes the highest current 21700 Li-Ion cell on the market
• Higher capacity and lower weight than a similar-sized LiPo
• Copper tabs throughout differentiate Upgrade Energy from the competition
• Designed through thermal analysis for optimal heat dissipation
• Optimized power and balance lead lengths for minimal weight and wire tangle