This Lithium and lead-acid battery tester performs external load capacity tests of the battery as well as other tests, 18650 tools, single function, by controlling the load off and obtaining real-time integrated discharge current capacity results.
3V-36VDC Automotive Voltage Circuit Probe Tester Pen.
TEC4056 TP4056 Charger Module Micro-USB 18650 4.2V lithium battery charger Non-Protection Board Module.