{"product_id":"ebc-a40l","title":"Single Cell Capacity Tester \u0026 Charger, 5V 40A - Zketech EBC-A40L","description":"\u003c!-- ========== IMAGE 1: HERO - unit 3\/4 angle, screen lit, clipped to a large prismatic cell ========== --\u003e\n\u003cp\u003eThe \u003cstrong\u003eZKETECH EBC-A40L\u003c\/strong\u003e is a high-current single-cell tester: charger, programmable load and capacity meter in one bench unit, built for the large prismatic cells that modern packs are made from. It charges at up to \u003cstrong\u003e35 A\u003c\/strong\u003e and discharges at up to \u003cstrong\u003e40 A\u003c\/strong\u003e on a single cell up to \u003cstrong\u003e5 V\u003c\/strong\u003e, and measures real capacity in amp-hours and watt-hours while it works.\u003c\/p\u003e\n\u003cp\u003eThis is the tool for grading 100 Ah to 320 Ah LiFePO₄ cells before you build with them. At 5 A, a 280 Ah cell takes over two days to discharge. At 30 A it takes about nine hours, so you can run one cell per day and grade a full sixteen-cell set in a working fortnight instead of a season.\u003c\/p\u003e\n\u003ch2\u003eKey features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e35 A charge and 40 A discharge\u003c\/strong\u003e on a single cell, inside a 180 W discharge envelope.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFull current across the whole cell range\u003c\/strong\u003e. A 40 A discharge at 3.65 V is 146 W, inside the 180 W limit, so unlike lower-power testers the A40L never has to reduce current on a lithium cell.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBuilt-in AC power supply\u003c\/strong\u003e. Plugs straight into the wall, no external brick to size or lose. \u003c!-- TODO confirm 110\/220 selector vs auto-ranging --\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCC-CV charging, and constant-current or constant-power discharge\u003c\/strong\u003e, with settable cutoff current, cutoff voltage and step timer.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnattended multi-step cycling\u003c\/strong\u003e through the free EB Tester PC software: build a charge, discharge and recharge sequence, save it as a profile, and reload it for the next cell.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFour-wire measurement\u003c\/strong\u003e. Voltage and current run on separate channels, so lead resistance does not corrupt the reading. This matters far more at 40 A than it does at 5 A.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReal graphing\u003c\/strong\u003e. The software plots voltage and current against time and reports measured capacity in Ah and Wh, so you can compare cells side by side.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandalone operation\u003c\/strong\u003e. Front-panel buttons and LCD work with no computer attached. The software adds graphing and multi-step profiles.\u003c\/li\u003e\n\u003c\/ul\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 A40L is a \u003cstrong\u003esingle-cell\u003c\/strong\u003e instrument. Its range is 0–5 V, which covers every common lithium cell chemistry and nothing above one cell.\u003c\/p\u003e\n\u003ctable border=\"1\" cellspacing=\"0\" cellpadding=\"6\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eBattery\u003c\/th\u003e\n\u003cth\u003eFull-charge voltage\u003c\/th\u003e\n\u003cth\u003eSuitable?\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLiFePO₄ prismatic cell (1s), 100–320 Ah\u003c\/td\u003e\n\u003ctd\u003e3.65 V\u003c\/td\u003e\n\u003ctd\u003eYes, this is what it is for\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLi-ion \/ NMC pouch or prismatic cell (1s)\u003c\/td\u003e\n\u003ctd\u003e4.2 V\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLTO cell (1s)\u003c\/td\u003e\n\u003ctd\u003e2.8 V\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSodium-ion cell (1s)\u003c\/td\u003e\n\u003ctd\u003e4.0 V\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCylindrical cells (18650, 21700, 32700)\u003c\/td\u003e\n\u003ctd\u003e3.65–4.2 V\u003c\/td\u003e\n\u003ctd\u003eYes, though 40 A is far more current than these need\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAny 2s or larger pack, 12 V pack, 24 V pack\u003c\/td\u003e\n\u003ctd\u003eover 5 V\u003c\/td\u003e\n\u003ctd\u003eNo. Use a pack-level tester instead\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp style=\"margin-top: 1em;\"\u003e\u003cstrong\u003eTesting an assembled pack instead of loose cells?\u003c\/strong\u003e The A40L cannot do it. Look at the EBC-A20 for packs up to 30 V, or the EBC-B20H for 12–72 V packs.\u003c\/p\u003e\n\u003ch2\u003eAbout the 40 A rating and your test leads\u003c\/h2\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\u003eRead this before you buy.\u003c\/strong\u003e The tester will deliver 40 A. The included leads are the limiting factor, not the electronics. Stock 10 AWG cable is good for roughly \u003cstrong\u003e30 A sustained\u003c\/strong\u003e before it heats, and hot leads add resistance that skews your measurement. Plan on 30 A for long runs, or fit heavier cable with ring terminals.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp\u003eZKETECH itself recommends testing lithium cells at around \u003cstrong\u003e0.2 C\u003c\/strong\u003e, which is 20 A on a 100 Ah cell and 56 A on a 280 Ah cell. In other words, on the large cells this tester is built for, you are not current-limited by the instrument at all. You are limited by cable, and by how long you want to wait.\u003c\/p\u003e\n\u003cp\u003eHere is what that means in real time on the bench:\u003c\/p\u003e\n\u003ctable border=\"1\" cellspacing=\"0\" cellpadding=\"6\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eCell\u003c\/th\u003e\n\u003cth\u003eat 20 A\u003c\/th\u003e\n\u003cth\u003eat 30 A\u003c\/th\u003e\n\u003cth\u003eat 40 A\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e100 Ah LiFePO₄\u003c\/td\u003e\n\u003ctd\u003e5.0 h\u003c\/td\u003e\n\u003ctd\u003e3.3 h\u003c\/td\u003e\n\u003ctd\u003e2.5 h\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e200 Ah LiFePO₄\u003c\/td\u003e\n\u003ctd\u003e10.0 h\u003c\/td\u003e\n\u003ctd\u003e6.7 h\u003c\/td\u003e\n\u003ctd\u003e5.0 h\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e280 Ah LiFePO₄\u003c\/td\u003e\n\u003ctd\u003e14.0 h\u003c\/td\u003e\n\u003ctd\u003e9.3 h\u003c\/td\u003e\n\u003ctd\u003e7.0 h\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e320 Ah LiFePO₄\u003c\/td\u003e\n\u003ctd\u003e16.0 h\u003c\/td\u003e\n\u003ctd\u003e10.7 h\u003c\/td\u003e\n\u003ctd\u003e8.0 h\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp style=\"margin-top: 1em;\"\u003eThose are discharge times only. A full charge, discharge and recharge cycle runs roughly two and a half times longer, which is why the unattended cycle function exists.\u003c\/p\u003e\n\u003c!-- ========== IMAGE 3: GRAPHIC - test time per cell size at 20\/30\/40A ========== --\u003e\n\u003ch2\u003eWorked example: grading a 280 Ah LiFePO₄ cell\u003c\/h2\u003e\n\u003cp\u003eThis is the test most customers run first, on every cell in a new set, before any of them go into a pack. It fully charges the cell, measures true capacity on the way down, then leaves it at a safe storage state.\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 30 A · Volt 3.65 V · Cutoff 2.8 A\u003c\/td\u003e\n\u003ctd\u003eCharges at 30 A until the cell reaches 3.65 V, then holds 3.65 V while current tapers. Ends at 0.01 C, which is 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 30 A · Cutoff 2.50 V\u003c\/td\u003e\n\u003ctd\u003eDraws a steady 30 A until the cell falls to 2.5 V. \u003cstrong\u003eThis step produces your capacity figure in Ah and Wh.\u003c\/strong\u003e About 9 h on a healthy 280 Ah cell.\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 30 A · Volt 3.35 V · Cutoff 2.8 A\u003c\/td\u003e\n\u003ctd\u003eRecharges to roughly 50 % state of charge, the right place to leave a cell that is going on a shelf before assembly.\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. Connect the cell, click \u003cstrong\u003eStart\u003c\/strong\u003e, and the tester runs all three stages back to back, roughly 22 h end to end. Save the profile and reload it for the next cell so every cell in the set is graded on identical terms. That is the whole point: a comparison is only valid if the test is the same every time.\u003c\/p\u003e\n\u003cdiv style=\"border-left: 4px solid #2980b9; background: #f2f8fd; padding: 12px 16px; margin: 1em 0;\"\u003e\n\u003cp style=\"margin: 0;\"\u003e\u003cstrong\u003eCompression matters.\u003c\/strong\u003e Most large prismatic cells, EVE cells in particular, specify a fixture pressure during cycling. Testing a bare unclamped cell at 30 A can read low and will swell the cell over repeated cycles. Test cells in the fixture, or at least clamped between two plates.\u003c\/p\u003e\n\u003c\/div\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 cycle as a graph: one trace for voltage, one for current, plotted against time. The D-CC step reports measured capacity in amp-hours alongside total watt-hours.\u003c\/p\u003e\n\u003cp\u003eThree things to look at. First, \u003cstrong\u003ethe number against the rating\u003c\/strong\u003e: a new grade-A 280 Ah cell should measure at or above 280 Ah at a 0.1–0.2 C rate. Meaningfully under that is a grade-B cell, whatever the invoice said. Second, \u003cstrong\u003ethe spread across the set\u003c\/strong\u003e: sixteen cells within a couple of percent of each other build a pack that balances easily and stays balanced. One outlier drags the whole pack down to its own capacity. Third, \u003cstrong\u003ethe shape of the curve\u003c\/strong\u003e: LiFePO₄ holds a long flat plateau near 3.2 V and then falls off sharply. A cell that starts sagging early in the plateau has higher internal resistance than its siblings, and is a poor match for them even if the amp-hour number looks acceptable.\u003c\/p\u003e\n\u003c!-- ========== IMAGE 5: SOFTWARE SCREENSHOT - completed test chart, annotated ========== --\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-A40L: 5 V \/ 40 A \/ 180 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\u003eAC mains, internal supply \u003c!-- TODO GATE: the ZKETECH manual spec table says AC 220V with no selector. Confirm a 110V unit exists before listing in the US. --\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eVoltage range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0.000–5.000 V, single cell only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCharge current\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0.10–35.00 A in 0.01 A steps\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDischarge current\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0.10–40.00 A in 0.01 A steps\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\u003e180 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCharge mode\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eConstant current then constant voltage, stop on cutoff current, time or manual\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDischarge mode\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eConstant current or constant power, stop on cutoff voltage, time or manual\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eVoltage accuracy\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0.2 % ±0.003 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCurrent accuracy\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0.2 % ±0.01 A\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\u003eMeasurement\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eFour-wire, voltage and current channels separated, through two front-panel aviation sockets\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 and energy\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, for graphing, calibration and firmware updates\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCooling\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eForced air, thermostatic fan\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePacked weight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e6.5 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\u003e\u003c!-- TODO from supplier PI --\u003e\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-A40L battery tester\u003c\/li\u003e\n\u003cli\u003eAC power cord\u003c\/li\u003e\n\u003cli\u003eUSB-TTL communication cable for PC connection\u003c\/li\u003e\n\u003cli\u003eTest leads with alligator clips\u003c\/li\u003e\n\u003cli\u003ePrinted user manual, plus software download links\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- TODO confirm the whole list and the lead gauge \/ terminal type against the supplier PI --\u003e\n\u003cp\u003e \u003c\/p\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, and on a tester that runs 9-hour discharges, the graph is most of the value.\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 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\u003eGrading new grade-A and grade-B prismatic cells on arrival, before they go into a pack\u003c\/li\u003e\n\u003cli\u003eMatching a set of 4, 8 or 16 cells so the pack is built from consistent capacity\u003c\/li\u003e\n\u003cli\u003eVerifying a supplier’s stated capacity, with a curve you can attach to a claim\u003c\/li\u003e\n\u003cli\u003eCapacity-testing salvaged or second-life cells to decide what they are worth\u003c\/li\u003e\n\u003cli\u003eRepeatable cycle-life testing at realistic C-rates\u003c\/li\u003e\n\u003cli\u003eRecovering and re-testing a cell that came out of balance in an existing pack\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- ========== IMAGE 7: IN USE - clipped to a 280Ah cell in a compression fixture, laptop showing the graph ========== --\u003e\n\u003ch2\u003eSafety and usage notes\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSingle cells only, 5 V maximum.\u003c\/strong\u003e Connecting a 12 V pack will damage the tester.\u003c\/li\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\u003eWatch your leads.\u003c\/strong\u003e Stock 10 AWG cable is good for about 30 A sustained. Heavier cable with ring terminals is the single best upgrade you can make to this instrument.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGet a solid connection.\u003c\/strong\u003e Alligator clips on a bare terminal are the most common source of a bad reading at high current. Bolt to the terminal where you can.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest cells under compression\u003c\/strong\u003e where the manufacturer specifies it, and keep cells near 25 °C for comparable results.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKeep the vents clear.\u003c\/strong\u003e The unit dissipates up to 180 W as heat and the fan needs airflow around the case.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUse the supplied USB-TTL cable.\u003c\/strong\u003e An ordinary USB cable will not communicate; the supplied cable contains a serial converter.\u003c\/li\u003e\n\u003cli\u003eAllow a rest period between discharge and recharge in auto cycling so the cell can settle.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eCan it test a 12 V battery?\u003c\/strong\u003e\u003cbr\u003eNo. The A40L is a single-cell instrument with a 5 V ceiling. For 12 V and 24 V packs look at the EBC-A20; for 12–72 V packs, the EBC-B20H.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill it really discharge at 40 A?\u003c\/strong\u003e\u003cbr\u003eYes, on discharge. Unlike lower-power testers, the A40L does not derate on a lithium cell: 40 A at 3.65 V is 146 W, inside its 180 W envelope. Charging is capped slightly lower, at 35 A. The practical limit is your cable. Stock 10 AWG leads are good for around 30 A sustained.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow long does a 280 Ah cell take?\u003c\/strong\u003e\u003cbr\u003eAbout 9 h to discharge at 30 A, or roughly 22 h for a full charge, discharge and recharge cycle. Set the step timer to 0 so nothing cuts the run short.\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.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDo I need a computer to use it?\u003c\/strong\u003e\u003cbr\u003eNo. Modes, currents and cutoffs are all settable from the front panel and results show on the LCD. The software adds graphing and multi-step profiles.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I test two cells in parallel?\u003c\/strong\u003e\u003cbr\u003eYes, if they are already at the same voltage. The tester reads them as one cell, so you get a combined capacity, not individual numbers. For grading, test cells one at a time.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA20 or A40L?\u003c\/strong\u003e\u003cbr\u003eThe A20 is an 85 W tester that covers packs up to 30 V but slows to a crawl on large cells. The A40L is 200 W and single-cell only. If you build with 100 Ah or larger prismatics, you want the A40L. Many builders own both.\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\/EBC-A40_User_Manual_2020.pdf?v=1788268780\" target=\"_blank\" title=\"EBC-A40_User_Manual_2020\" rel=\"noopener\"\u003eDownload the official EBC-A40L 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":46547261128854,"sku":"EBC-A40L","price":427.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0459\/7609\/2822\/files\/H2ff4664e55b747fab25ef7fdc28de703S.png_960x960q80.jpg?v=1788294984","url":"https:\/\/ogsolarstore.com\/en-au\/products\/ebc-a40l","provider":"OGSolarStore","version":"1.0","type":"link"}