NSTL has a tender for supply of 5 units of Li-ion battery packs with battery management system:
So each battery pack has 13 cell & each cell can produce 480 W of electric power. Thus total power is (480 x 13)= 6240 W = 6.24 kW
This new Li-ion battery is a lab scale test battery. This is the 1st time we willbe using Li-ion batteries to underwater applications. For comparison the Silver Oxide Zinc battery used on the ALWT has 70 kW power. The Varunastra has 250 W Silver Oxide Zinc battery.
The submarine launched version of the Varunastra (called the EHWT) with have an upgraded 300 kW Silver Oxide Zinc battery. That battery is under prototype testing:
Maybe a scaled up version of the Li-ion battery can be used on the upcoming Jalastra torpedo.