{"product_id":"usb-current-voltage-tester-battery-capacity-time-display-power-bank-meter","title":"USB Current \u0026 Voltage Tester — Battery Capacity \u0026 Time Display, 4–9V, 0–3.3A, Power Bank Meter","description":"\u003ch2\u003eUSB Current \u0026amp; Voltage Tester — Battery Capacity \u0026amp; Time Display\u003c\/h2\u003e\u003cp\u003eThis \u003cstrong\u003eUSB power meter\u003c\/strong\u003e measures voltage, current, accumulated battery capacity (mAh), and working time simultaneously, displaying all four parameters on a clear digital screen. It is the essential tool for testing USB charger output quality, measuring power bank capacity, and monitoring USB device power consumption. With ±1% measurement accuracy and a memory function that retains capacity and time data between sessions, it provides reliable data for DIY electronics and battery testing.\u003c\/p\u003e\u003ch3\u003eKey Specifications\u003c\/h3\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage Range\u003c\/td\u003e\n\u003ctd\u003e4V – 9V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCurrent Range\u003c\/td\u003e\n\u003ctd\u003e0A – 3.3A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Voltage\u003c\/td\u003e\n\u003ctd\u003e3.5V – 9V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCapacity Range\u003c\/td\u003e\n\u003ctd\u003e0 – 99,999 mAh\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTime Range\u003c\/td\u003e\n\u003ctd\u003e0 – 99 hours\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMeasurement Accuracy\u003c\/td\u003e\n\u003ctd\u003e±1%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMemory Function\u003c\/td\u003e\n\u003ctd\u003eYes (retains capacity + time data)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e68 × 23 × 12mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch3\u003eWhy Choose This USB Tester?\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e✅ \u003cstrong\u003e4-in-1 display\u003c\/strong\u003e — voltage, current, capacity (mAh), and time on one screen\u003c\/li\u003e\n\u003cli\u003e✅ \u003cstrong\u003eMemory function\u003c\/strong\u003e — accumulated mAh and time retained across power cycles\u003c\/li\u003e\n\u003cli\u003e✅ \u003cstrong\u003e±1% accuracy\u003c\/strong\u003e — reliable measurements for battery capacity verification\u003c\/li\u003e\n\u003cli\u003e✅ \u003cstrong\u003eUp to 3.3A measurement\u003c\/strong\u003e — covers fast-charge USB outputs (5V\/3A)\u003c\/li\u003e\n\u003cli\u003e✅ \u003cstrong\u003eCompact inline design\u003c\/strong\u003e — plugs between charger and device, no wiring needed\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTypical Applications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eUSB power bank actual capacity measurement\u003c\/li\u003e\n\u003cli\u003eUSB charger output voltage and current verification\u003c\/li\u003e\n\u003cli\u003eUSB device power consumption monitoring\u003c\/li\u003e\n\u003cli\u003eBattery discharge capacity testing\u003c\/li\u003e\n\u003cli\u003eSolar panel USB output performance testing\u003c\/li\u003e\n\u003cli\u003eDIY power bank build quality verification\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003ePackage Contents\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e1 × USB Current \u0026amp; Voltage Tester with Capacity \u0026amp; Time Display\u003c\/li\u003e\u003c\/ul\u003e","brand":"Keszoox","offers":[{"title":"Default Title","offer_id":46991431925995,"sku":"\u003cnone\u003e","price":11.88,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0677\/1005\/8731\/files\/usb-current-voltage-tester-battery-capacity-time-display.webp?v=1761882692","url":"https:\/\/keszoox.com\/products\/usb-current-voltage-tester-battery-capacity-time-display-power-bank-meter","provider":"Keszoox","version":"1.0","type":"link"}