What means QRP? The answer is to use transceiver with low (less than 10 watt) power. The radios are often homemade built from a kit with the goal to keep it tiny and light weight. The power comes from batteries, powerbanks and photovoltaic devices.
I will show you now my equipment for QRP and will give you further information to that chapter of Amateur Radio.
On the picture you can see the Power Bank on the upper left and next to it a logbook. On the bottom left my QRP Radio with 5 Watt Output
POWERBANK XT-20000QC3-AO-PA
Batterietype: Lithium-Ionen
Capacity: 20100 mAh (3,7V) 73Wh
Dimensions: 174 x 78 x 21,5mm
Weight: ca. 450g
For more details see the website: www.xtpower.com