Ampere Pulse: Charger Tester

Is your phone charging slowly? Find out in 30 seconds whether it's the charger, the cable or the phone. Ampere Pulse is a charger tester and live battery monitor that shows exactly how much charging current (mA) and power (watts) is reaching your battery. ⚡ CHARGER TESTER: CHARGING SPEED TEST IN 30 SECONDS Plug in, tap Start and get a clear verdict: Slow, Normal, Fast or Very fast. • Measures average and peak charging current in mA • Shows charging power in watts (W) • Skips the first seconds while charging ramps up, for a steadier result • Detects the connection: AC charger, USB, wireless charging or dock • Warns you when the battery is above 80%, where every phone charges slower • Stops automatically if the charger is unplugged 🔌 CABLE TESTER & CHARGER COMPARISON Not sure which cable is the fast one? Test each charger and USB cable, name the result (wall charger, car charger, laptop USB, power bank, wireless pad) and save it. Saved tests are ranked from fastest to slowest with a clear bar for each, and every new test shows how it compares with your best charger. 📊 LIVE BATTERY MONITOR • Real-time charging and discharging current in mA, like an ampere meter for your phone • Real-time power in watts, like a watt meter • Minimum and maximum current during each charging session • Battery temperature in °C or °F • Battery voltage • Remaining charge in mAh • Battery health status and battery technology as reported by Android • Charging status and connection type at a glance • Device manufacturer, model and Android version 🔔 BATTERY ALERTS Get a notification when your battery drops below 20%, reaches 80% while charging, or is fully charged, while Ampere Pulse is running. 🌙 SIMPLE, LIGHTWEIGHT AND PRIVATE • Works offline: no internet needed for battery readings or charger tests • No account, no sign-up • Light and dark theme • Choose mA or watts, °C or °F • Your battery readings and saved tests stay on your phone WHY TEST YOUR CHARGER AND CABLE? Chargers and USB cables wear out. A damaged or low-quality cable, an old USB port or a weak power bank can make your phone charge much slower than it should. Ampere Pulse shows you which one is slow, so you know what to replace. Use it to: • Check whether a new fast charger really delivers fast charging • Find the slow cable in your drawer • Test a car charger or power bank before a trip • Compare wireless charging with a cable • Understand why your phone suddenly charges slowly TIPS FOR ACCURATE RESULTS • Test with the battery below 80% • Keep the screen on and don't use the phone during the test • Compare chargers at a similar battery level and temperature QUESTIONS PEOPLE ASK Why is my phone charging slowly? Usually a worn USB cable, a low-power charger or a battery above 80%. Run a charging speed test with each charger and cable to find the cause. Is my fast charger really working? Test below 80% battery. A Fast or Very fast verdict means your fast charger and cable are doing their job. How many watts does my phone charge at? The test shows the average watts reaching your battery and the highest battery temperature. The live monitor also shows battery voltage. GOOD TO KNOW Ampere Pulse measures the power actually reaching your battery, using your phone's own battery sensor. This is usually lower than the number printed on the charger, because the phone uses some power while it charges and slows charging as the battery fills. Accuracy depends on your phone's hardware; some phones update readings less often, and a few don't report charging current at all. Ampere Pulse is free and supported by ads. Watch an optional short video any time to pause pop-up ads for 24 hours. Questions or ideas? Email [email protected]. We read every message.