This blog is about Battery Specific Power
Specific Power is defined as the power capacity per kilogram of battery, in W/kg. Some battery technologies offer high energy density but low specific power, which means that even though they can store a large amount of energy, they can only supply a small amount of power instantly. In transportation terms, this would mean that a vehicle could run for a long distance, at low speed. On the contrary, batteries with high specific power usually have a low energy density, because high discharge currents usually reduce the available energy rapidly (e.g., high acceleration)