Overview

The DL24/P is the tool you didn't know you needed until a '10,000 mAh' power bank died at 6,000. It works as both a USB tester and a programmable electronic load: clamp it across a battery or feed it from a charger and it logs voltage, current, capacity (mAh/Wh) and discharge curves on its 2.4-inch color screen, then syncs the data to a phone app over Bluetooth. Use it to grade old 18650 cells, verify a solar panel's output, or stress-test a USB-C cable's real wattage. The color display reads clearly in sunlight, the thresholds are settable so it auto-cuts at your low-voltage limit, and the whole thing fits in a shirt pocket. For makers, repair techs and anyone who'd rather measure than guess, it pays for itself the first time it exposes a fake battery.

At a glance

Pros & cons

FAQ