Uploaded June 2026 | Updated September 2026, 2 weeks ago
tester to prove what was actually happening at the power input. Spoiler: it worked, and the numbers genuinely surprised me. In this video I walk through exactly how to use an inexpensive USB tester to measure the real current draw of your ham radios, including handhelds, QRP HF rigs, and digital hotspots. If you have ever wondered how long your battery will actually last in the field, or whether your power bank can really push enough juice for HF, this is the test bench setup that answers it without guesswork. I also put the Ugreen power bank through its paces with the FX4CR, including charging behavior, voltage stability under transmit load, and what happens when you push it harder than the spec sheet suggests it should handle. For SOTA activators, POTA operators, EmComm folks, and anyone running portable or off grid, this kind of real world measurement is the difference between a confident deployment and a dead radio at the worst possible moment. Whether you are putting together a go kit, planning your next POTA activation, or just trying to squeeze every watt out of a small battery, the USB tester earns its place in the toolbox fast. And the Ugreen power bank earns a spot in the field bag.
🔹My Favorite Gear - amazon.com/shop/km4ack
🔹Links mentioned in the video
USB Tester - amzn.to/3SOzaik
USB C Trigger Cable - amzn.to/4w3ian3
UGreen Battery - amzn.to/44hlCyi
Red Tip Barrel Connector (Kenwood)- amzn.to/4d8z61Z
Yellow Tip Barrel Connector (Yaesu) - amzn.to/3zTMMQ8
🔹Weekly Newsletter - https://mailchi.mp/40da1fe472e3/km4acknewsletter
🔹Follow Me
Twitter @km4ack
🔹Cool Ham Gear - km4ack.com
🔹Support the channel through Patreon - patreon.com/km4ack
🔹🔹🔹🔹🔹
As an Amazon Associate I earn from qualifying purchases
tester to prove what was actually happening at the power input. Spoiler: it worked, and the numbers genuinely surprised me. In this video I walk through exactly how to use an inexpensive USB tester to measure the real current draw of your ham radios, including handhelds, QRP HF rigs, and digital hotspots. If you have ever wondered how long your battery will actually last in the field, or whether your power bank can really push enough juice for HF, this is the test bench setup that answers it without guesswork. I also put the Ugreen power bank through its paces with the FX4CR, including charging behavior, voltage stability under transmit load, and what happens when you push it harder than the spec sheet suggests it should handle. For SOTA activators, POTA operators, EmComm folks, and anyone running portable or off grid, this kind of real world measurement is the difference between a confident deployment and a dead radio at the worst possible moment. Whether you are putting together a go kit, planning your next POTA activation, or just trying to squeeze every watt out of a small battery, the USB tester earns its place in the toolbox fast. And the Ugreen power bank earns a spot in the field bag.
🔹My Favorite Gear - amazon.com/shop/km4ack
🔹Links mentioned in the video
USB Tester - amzn.to/3SOzaik
USB C Trigger Cable - amzn.to/4w3ian3
UGreen Battery - amzn.to/44hlCyi
Red Tip Barrel Connector (Kenwood)- amzn.to/4d8z61Z
Yellow Tip Barrel Connector (Yaesu) - amzn.to/3zTMMQ8
🔹Weekly Newsletter - https://mailchi.mp/40da1fe472e3/km4acknewsletter
🔹Follow Me
Twitter @km4ack
🔹Cool Ham Gear - km4ack.com
🔹Support the channel through Patreon - patreon.com/km4ack
🔹🔹🔹🔹🔹
As an Amazon Associate I earn from qualifying purchases
