{"product_id":"ebc-a20","title":"Battery Capacity Tester \u0026 Charger, 30V 20A - Zketech EBC-A20","description":"\u003c!-- ========== IMAGE 1: HERO — unit 3\/4 angle, screen lit, mid-test ========== --\u003e\n\u003cp\u003eThe \u003cstrong\u003eZKETECH EBC-A20\u003c\/strong\u003e is a combined battery charger, programmable load and capacity meter in one bench unit. It charges at up to \u003cstrong\u003e18 V \/ 5 A\u003c\/strong\u003e, discharges at up to \u003cstrong\u003e30 V \/ 20 A\u003c\/strong\u003e, and measures real capacity in amp-hours and watt-hours while it works. Connect it to a PC with the included USB-TTL cable and you can program a full charge→discharge→recharge cycle, walk away, and come back to a finished capacity number and a plotted curve.\u003c\/p\u003e\n\u003cp\u003eIt is the tool you reach for when you need to know what a battery \u003cem\u003eactually\u003c\/em\u003e holds, not what the label claims. That makes it standard kit for anyone buying salvaged or surplus cells, grading used LiFePO₄ packs, testing 18650s before building a pack, or proving a warranty claim.\u003c\/p\u003e\n\u003ch2\u003eKey features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCharge, discharge and measure in one unit\u003c\/strong\u003e — no separate charger, load bank and meter. Charge 0.10–5.00 A up to 18 V, discharge 0.10–20.00 A down from 30 V.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThree test modes\u003c\/strong\u003e — constant-current discharge (DSC-CC) for capacity tests, constant-power discharge (DSC-CP) to simulate a real load, and constant-voltage charge (CHG-CV) for lithium and lead-acid.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnattended auto cycling\u003c\/strong\u003e — built-in AUTO mode runs charge→discharge→charge on its own, with a settable rest period between steps so cells cool before the next stage.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFour-wire measurement\u003c\/strong\u003e — voltage and current run on separate channels through the aviation connectors, so lead resistance does not corrupt the reading. Voltage and current are both accurate to ±0.5 %.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePC software with real graphing\u003c\/strong\u003e — the free EB Tester software plots voltage and current against time, stores multi-step test profiles you can reload, and handles calibration and firmware updates.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWorks with every common chemistry\u003c\/strong\u003e — lead-acid, Li-ion, LiPo, LiFePO₄ and ternary lithium, from a single cell up to 7s.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBench-friendly\u003c\/strong\u003e — vented aluminium housing with a thermostatic fan, clear LCD readout, and a four-button interface that works standalone with no computer attached.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSample Charge Curve from a Sodium-ion cell\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0459\/7609\/2822\/files\/18650-NFPP-charge-0.5.jpg?v=1788186320\" alt=\"\"\u003e\u003c\/p\u003e\n\u003c!-- ========== IMAGE 2: LCD CLOSE-UP with callout labels on each field ========== --\u003e\n\u003ch2\u003eWhat you can test\u003c\/h2\u003e\n\u003cp\u003eThe charge side tops out at 18 V and the discharge side at 30 V, so the tester covers a wider range of packs on discharge than on charge. Check your pack here before you buy:\u003c\/p\u003e\n\u003ctable border=\"1\" cellspacing=\"0\" cellpadding=\"6\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003ePack\u003c\/th\u003e\n\u003cth\u003eFull-charge voltage\u003c\/th\u003e\n\u003cth\u003eCharge?\u003c\/th\u003e\n\u003cth\u003eDischarge?\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSingle Li-ion \/ LiPo cell (1s)\u003c\/td\u003e\n\u003ctd\u003e4.2 V\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSingle LiFePO₄ cell (1s)\u003c\/td\u003e\n\u003ctd\u003e3.65 V\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLi-ion 2s–4s\u003c\/td\u003e\n\u003ctd\u003e8.4–16.8 V\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLiFePO₄ 4s (12 V nominal)\u003c\/td\u003e\n\u003ctd\u003e14.6 V\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e12 V lead-acid \/ AGM\u003c\/td\u003e\n\u003ctd\u003e14.4–14.8 V\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLi-ion 5s–7s\u003c\/td\u003e\n\u003ctd\u003e21.0–29.4 V\u003c\/td\u003e\n\u003ctd\u003eNo — over 18 V\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLiFePO₄ 8s (24 V nominal)\u003c\/td\u003e\n\u003ctd\u003e29.2 V\u003c\/td\u003e\n\u003ctd\u003eNo — over 18 V\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e24 V lead-acid\u003c\/td\u003e\n\u003ctd\u003e28.8 V\u003c\/td\u003e\n\u003ctd\u003eNo — over 18 V\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp style=\"margin-top: 1em;\"\u003e\u003cstrong\u003eTesting a 24 V pack?\u003c\/strong\u003e Charge it with your own charger, then use the EBC-A20 in discharge-only mode to measure capacity. You still get the full capacity reading and discharge curve.\u003c\/p\u003e\n\u003ch2\u003eUnderstanding the 85 W discharge limit\u003c\/h2\u003e\n\u003cdiv style=\"border-left: 4px solid #c0392b; background: #fdf3f2; padding: 12px 16px; margin: 1em 0;\"\u003e\n\u003cp style=\"margin: 0;\"\u003e\u003cstrong\u003eRead this before you buy.\u003c\/strong\u003e The EBC-A20 is an \u003cstrong\u003e85 W\u003c\/strong\u003e load. The 20 A maximum only applies at low voltage — at higher pack voltages the unit is limited by wattage, not amperage, and automatically reduces current to stay within 85 W.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp\u003eIn practice that means 20 A is available for single-cell testing, while a 12 V pack discharges at around 6 A. Here is the realistic maximum discharge current at common pack voltages:\u003c\/p\u003e\n\u003ctable border=\"1\" cellspacing=\"0\" cellpadding=\"6\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003ePack voltage (nominal)\u003c\/th\u003e\n\u003cth\u003eMax discharge current\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3.2–4.2 V (1s)\u003c\/td\u003e\n\u003ctd\u003e20 A (full rated current)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e7.4 V (2s Li-ion)\u003c\/td\u003e\n\u003ctd\u003eapprox. 11.5 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e12 V lead-acid \/ 4s LiFePO₄\u003c\/td\u003e\n\u003ctd\u003eapprox. 6.5 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e14.8 V (4s Li-ion)\u003c\/td\u003e\n\u003ctd\u003eapprox. 5.7 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e24 V lead-acid \/ 7s Li-ion\u003c\/td\u003e\n\u003ctd\u003eapprox. 3.3 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp style=\"margin-top: 1em;\"\u003eThis is normal behavior, not a fault. A capacity test at 6 A on a 100 Ah pack simply takes longer — the measured amp-hour figure is just as accurate. If you need a high-current load for large 12 V and 24 V packs, look at a higher-wattage tester instead.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThere is a matching rule on the charge side:\u003c\/strong\u003e for any battery above 10 V, ZKETECH specifies a charge current at least 0.5 A below your power supply's rating. With the included 19 V \/ 3.5 A supply, keep charge current at or below \u003cstrong\u003e3 A\u003c\/strong\u003e for 12 V packs. Fit a larger 19 V supply if you want the full 5 A.\u003c\/p\u003e\n\u003c!-- ========== IMAGE 3: GRAPHIC — 85W power envelope, current vs voltage ========== --\u003e\n\u003ch2\u003eWorked example: capacity-testing a 12 V LiFePO₄ pack\u003c\/h2\u003e\n\u003cp\u003eThis is the test most customers run first. It fully charges the pack, measures true capacity on the way down, then leaves it at a safe storage charge. Set it up once and it runs unattended.\u003c\/p\u003e\n\u003cp\u003eOpen EB Tester, connect to the tester, click \u003cstrong\u003eCycle Test\u003c\/strong\u003e, then \u003cstrong\u003eSetting\u003c\/strong\u003e (the button at the bottom right, not the Setting tab at the top). Add three steps:\u003c\/p\u003e\n\u003ctable border=\"1\" cellspacing=\"0\" cellpadding=\"6\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eStep\u003c\/th\u003e\n\u003cth\u003eMode\u003c\/th\u003e\n\u003cth\u003eSettings\u003c\/th\u003e\n\u003cth\u003eWhat happens\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003ctd\u003eC-CV (charge, constant voltage)\u003c\/td\u003e\n\u003ctd\u003eCurrent 3 A · Volt 14.6 V · Cutoff 0.2 A\u003c\/td\u003e\n\u003ctd\u003eCharges at 3 A until the pack reaches 14.6 V, then holds 14.6 V while current tapers. Ends at 0.2 A — a genuine full charge.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003ctd\u003eD-CC (discharge, constant current)\u003c\/td\u003e\n\u003ctd\u003eCurrent 5 A · Cutoff 10.0 V\u003c\/td\u003e\n\u003ctd\u003eDraws a steady 5 A until the pack falls to 10 V. \u003cstrong\u003eThis step produces your capacity figure in Ah and Wh.\u003c\/strong\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3\u003c\/td\u003e\n\u003ctd\u003eC-CV (charge, constant voltage)\u003c\/td\u003e\n\u003ctd\u003eCurrent 3 A · Volt 13.2 V · Cutoff 0.2 A\u003c\/td\u003e\n\u003ctd\u003eRecharges only to nominal, leaving the pack at a safe voltage for storage or shipping.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp style=\"margin-top: 1em;\"\u003eClick \u003cstrong\u003eAdd\u003c\/strong\u003e after each step, then \u003cstrong\u003eOK\u003c\/strong\u003e. Your parameters load onto the main screen. Connect the pack to the clips, click \u003cstrong\u003eStart\u003c\/strong\u003e, and the tester runs all three stages back to back. A 22 Ah pack at 5 A takes roughly 10–13 hours end to end. Test profiles can be saved and reloaded for the next pack.\u003c\/p\u003e\n\u003cp\u003eAdjust the numbers for your chemistry: a 12 V AGM would use a 14.4 V charge and a 10.5 V cutoff; a single 18650 would use 4.2 V charge, a 0.05 C cutoff and a 2.8 V discharge floor.\u003c\/p\u003e\n\u003c!-- ========== IMAGE 4: SOFTWARE SCREENSHOT — Cycle Test dialog with these 3 steps entered ========== --\u003e\n\u003ch2\u003eReading your results\u003c\/h2\u003e\n\u003cp\u003eWhen the run finishes, the software shows the full cycle as a graph: one trace for voltage, one for current, plotted against time. You will see current jump to your set value and voltage climb during the charge phase, current taper off as the pack tops out, then the discharge phase where current holds flat and voltage slides down to your cutoff. The D-CC step reports measured capacity in amp-hours alongside total watt-hours.\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003eshape\u003c\/strong\u003e of the discharge curve tells you the chemistry and the health of the pack. LiFePO₄ holds a long flat plateau near nominal voltage before dropping off a cliff at the end. Li-ion slopes down steadily across the whole discharge. A pack that sags early, or delivers well under its rated capacity, is telling you something — which is exactly the point of running the test.\u003c\/p\u003e\n\u003c!-- ========== IMAGE 5: SOFTWARE SCREENSHOT — completed test chart, annotated (which trace is current, which is voltage, result box circled) ========== --\u003e\n\u003ch2\u003eTechnical specifications\u003c\/h2\u003e\n\u003ctable border=\"1\" cellspacing=\"0\" cellpadding=\"6\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eModel designation\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eEBC-A20 — 30 V \/ 20 A \/ 85 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePower supply\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDC 19–20 V, 3.5 A or higher. Barrel jack 5.5 \/ 2.1 mm, centre positive\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eVoltage setting range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0.00–30.00 V in 0.01 V steps (charge mode is capped at 18 V)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCharge current\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0.10–5.00 A in 0.01 A steps (limited by your power supply rating)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDischarge current\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0.10–20.00 A in 0.01 A steps, auto-reduced above 85 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaximum discharge power\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e85 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eManual modes\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDSC-CC constant-current discharge · DSC-CP constant-power discharge · CHG-CV constant-voltage charge\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAuto mode\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eUnattended charge–discharge–charge cycling with settable rest period\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eVoltage accuracy\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0–4.5 V: 0.003 V, ±0.5 % · 4.5–30 V: 0.01 V, ±0.5 %\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCurrent accuracy\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0.10–20.00 A: 0.01 A, ±0.5 %\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCapacity resolution\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eUnder 10 Ah: 0.001 Ah · 10–100 Ah: 0.01 Ah · Over 100 Ah: 0.1 Ah\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTest timer\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0–999 minutes per step; set 0 for no time limit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eConnections\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eTwo front-panel aviation sockets; voltage and current channels separated for four-wire accuracy\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDisplay\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eLCD showing mode, voltage, current, elapsed time, capacity, energy and power\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePC connection\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDedicated USB-TTL cable (mini-USB connector at the tester) for graphing, calibration and firmware updates\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e120 × 155 mm footprint\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eApproximately 2 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eShipping box\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e28 × 24 × 15 cm, 6 kg gross\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eWhat’s in the box\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eZKETECH EBC-A20 battery tester\u003c\/li\u003e\n\u003cli\u003e19 V \/ 3.5 A power supply with plug\u003c\/li\u003e\n\u003cli\u003eUSB-TTL communication cable for PC connection\u003c\/li\u003e\n\u003cli\u003eTest leads with aviation connectors and alligator clips\u003c\/li\u003e\n\u003cli\u003ePrinted user manual, plus software download links\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- ========== IMAGE 6: FLAT LAY — everything in the box, arranged and labelled ========== --\u003e\n\u003ch2\u003eConnecting to your computer\u003c\/h2\u003e\n\u003cp\u003eThe tester works fully standalone using its front-panel buttons. The software is what unlocks graphing and multi-step cycle programming.\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall the USB-TTL driver\u003c\/strong\u003e, then install the \u003cstrong\u003eEB Tester\u003c\/strong\u003e software. Download links for both are in the manual and at zketech.com.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWindows in S Mode?\u003c\/strong\u003e You will need to leave it first, or Windows will block the install. Open the Microsoft Store, search “switch out of S mode”, and click Get. S Mode is often preset on budget laptops.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower on the tester\u003c\/strong\u003e and connect the included USB adapter between the tester and your PC.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOpen EB Tester\u003c\/strong\u003e and find \u003cstrong\u003eComm Setting\u003c\/strong\u003e. Choose your COM port and click Connect. It is usually a number between COM3 and COM9 — if this is the only USB serial device attached, COM3 is the likely one. If no port appears, the driver has not installed correctly.\u003c\/li\u003e\n\u003cli\u003eOnce connected, the \u003cstrong\u003eCycle Test\u003c\/strong\u003e tab appears at the top right. That is where you build multi-step test profiles.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cdiv style=\"border-left: 4px solid #d68910; background: #fdf8ef; padding: 12px 16px; margin: 1em 0;\"\u003e\n\u003cp style=\"margin: 0;\"\u003e\u003cstrong\u003eWindows only.\u003c\/strong\u003e ZKETECH has confirmed the EB Tester software does not currently run on macOS. Mac users can still operate the tester manually from its front panel, but cannot graph or program cycle tests.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch2\u003eTypical applications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eVerifying the true capacity of used, salvaged or surplus cells and packs before you build with them\u003c\/li\u003e\n\u003cli\u003eGrading and matching cells so a pack is built from consistent capacity\u003c\/li\u003e\n\u003cli\u003eConfirming a new battery actually delivers its rated amp-hours\u003c\/li\u003e\n\u003cli\u003eRunning repeatable cycle-life tests on small packs\u003c\/li\u003e\n\u003cli\u003eSimulating a constant-power load for electronics and product development\u003c\/li\u003e\n\u003cli\u003eDocumenting voltage sag and capacity loss for warranty or resale evidence\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- ========== IMAGE 7: IN USE — tester clipped to a real 12V LiFePO4 pack on a bench, laptop showing the graph ========== --\u003e\n\u003ch2\u003eSafety and usage notes\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eNever reverse polarity.\u003c\/strong\u003e Check your clip connections before starting a test.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLeave the BMS connected\u003c\/strong\u003e when testing a pack that has one, and test in a safe, uncluttered area away from flammable material.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKeep the vents clear.\u003c\/strong\u003e The unit dissipates up to 85 W as heat; the fan needs airflow around the case.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCharge is capped at 18 V.\u003c\/strong\u003e Packs charging above that need an external charger — discharge testing still works up to 30 V.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAbove 10 V, keep charge current 0.5 A below your power supply’s rating\u003c\/strong\u003e (3 A maximum with the included 3.5 A supply).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUse the supplied power adapter\u003c\/strong\u003e or an equivalent 19–20 V, 3.5 A+ unit with a 5.5 \/ 2.1 mm centre-positive plug.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUse the supplied USB-TTL cable.\u003c\/strong\u003e The port is a mini-USB socket, but an ordinary mini-USB cable will not communicate — the supplied cable contains a serial converter.\u003c\/li\u003e\n\u003cli\u003eIn auto cycling, allow a 5–10 minute rest between discharge and recharge so cells can cool.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eCan it test a 24 V battery?\u003c\/strong\u003e\u003cbr\u003eIt can discharge and capacity-test one, up to 30 V. It cannot charge it, because charging is capped at 18 V. Use your own charger for the charge stage.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy won’t it discharge my 12 V battery at 20 A?\u003c\/strong\u003e\u003cbr\u003eBecause the load is rated 85 W. At 12.8 V that works out to roughly 6.5 A, and the tester reduces current automatically to stay inside the limit. The 20 A figure applies to single-cell testing.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes it work on a Mac?\u003c\/strong\u003e\u003cbr\u003eNot for the software. ZKETECH has confirmed EB Tester is Windows only. Manual front-panel operation works regardless of what computer you own.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDo I need a computer to use it?\u003c\/strong\u003e\u003cbr\u003eNo. You can set modes, currents, cutoffs and even auto cycling from the four front-panel buttons and read results on the LCD. The PC software adds graphing and multi-step profiles.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the lowest cutoff current I can set?\u003c\/strong\u003e\u003cbr\u003e0.1 A. Anything below that cannot be entered.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan it test a 100 Ah battery?\u003c\/strong\u003e\u003cbr\u003eYes, and it resolves capacity to 0.1 Ah at that size. Budget the time: at roughly 6.5 A a 100 Ah pack takes over 15 hours to discharge. Set the step timer to 0 so it runs without a time limit.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I run tests unattended overnight?\u003c\/strong\u003e\u003cbr\u003eThat is what auto mode is designed for. Follow normal battery-testing precautions: a clear, non-flammable area, BMS connected, and good ventilation.\u003c\/p\u003e\n\u003ch2\u003eDownloads and support\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eUser manual:\u003c\/strong\u003e \u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0459\/7609\/2822\/files\/zketech-ebc_a20_manual.pdf?v=1754061231\" rel=\"noopener\" target=\"_blank\"\u003eDownload the official EBC-A20 user manual (PDF)\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSoftware:\u003c\/strong\u003e The EB Tester software and USB-TTL driver are free downloads from zketech.com, with links provided in the manual.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSystem requirements:\u003c\/strong\u003e Windows 7, 8, 10 or 11 with a free USB port and administrator rights to install the driver. Not compatible with macOS.\u003c\/p\u003e","brand":"OGSolarStore","offers":[{"title":"Default Title","offer_id":45232704782486,"sku":null,"price":196.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0459\/7609\/2822\/files\/main.webp?v=1754061055","url":"https:\/\/ogsolarstore.com\/en-ca\/products\/ebc-a20","provider":"OGSolarStore","version":"1.0","type":"link"}