Your trusted stabilizer with model number fvr-1500 is a 1.5 kilowatts stabilizer that comes with a sub port that can be used to charge an external device.
see technical specifications below-
output ac-220v max4.5a
input voltage-100v-260v
frequency-50hz
fuse-15a
model-fvr-1500
phase-single phase
light-led display