{"product_id":"zb2l3-battery-capacity-tester-led-18650-lithium-lead-acid","title":"ZB2L3 Battery Capacity Tester — LED Display for 18650 Li-ion \u0026 Lead-Acid Batteries","description":"\u003ch2\u003eZB2L3 Battery Capacity Tester — LED Display for 18650 Li-ion \u0026amp; Lead-Acid Batteries\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eZB2L3\u003c\/strong\u003e is a dedicated battery capacity tester that measures the actual usable capacity of rechargeable batteries using the \u003cstrong\u003econstant-current discharge method\u003c\/strong\u003e. It supports \u003cstrong\u003e18650 lithium-ion cells\u003c\/strong\u003e, NiMH packs, and \u003cstrong\u003elead-acid batteries\u003c\/strong\u003e, displaying real-time discharge capacity in mAh on a clear 4-digit LED readout. Essential for battery sorting, quality control, and DIY battery pack building.\u003c\/p\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003ctable\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\u003eModel\u003c\/td\u003e\n\u003ctd\u003eZB2L3\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eInput Voltage Range\u003c\/td\u003e\n\u003ctd\u003e1.2V – 12V\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eDischarge Current\u003c\/td\u003e\n\u003ctd\u003e0.1A – 3A (adjustable via external load resistor)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eCutoff Voltage\u003c\/td\u003e\n\u003ctd\u003eAdjustable (1.0V – 11.0V)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eMeasurement Range\u003c\/td\u003e\n\u003ctd\u003e0 – 9999 mAh\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eDisplay\u003c\/td\u003e\n\u003ctd\u003e4-digit red LED\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003ePower Supply\u003c\/td\u003e\n\u003ctd\u003eDC 4.5V – 6V (micro USB or external)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eCompatible Batteries\u003c\/td\u003e\n\u003ctd\u003e18650 Li-ion, NiMH, NiCd, Lead-Acid (1.2V–12V)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eCN\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhy Choose the ZB2L3?\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDischarge-based measurement\u003c\/strong\u003e — Measures actual usable capacity (mAh), not just voltage; reveals true battery health that voltage alone cannot show\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide battery compatibility\u003c\/strong\u003e — Tests 18650, 26650, AA\/AAA NiMH, 9V, and 6V\/12V lead-acid batteries within the 1.2V–12V input range\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAdjustable cutoff voltage\u003c\/strong\u003e — Set the discharge endpoint to match your battery chemistry (e.g., 2.75V for Li-ion, 1.0V for NiMH)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAuto-stop\u003c\/strong\u003e — Automatically stops discharge when cutoff voltage is reached, protecting cells from over-discharge damage\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eClear LED display\u003c\/strong\u003e — 4-digit red LED shows accumulated mAh in real time throughout the discharge cycle\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompact and portable\u003c\/strong\u003e — Small PCB module fits easily into test rigs, enclosures, or bench setups\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eTypical Applications\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eSorting and grading used 18650 cells for battery pack rebuilds\u003c\/li\u003e\n  \u003cli\u003eQuality control testing of new lithium cells before assembly\u003c\/li\u003e\n  \u003cli\u003eMeasuring remaining capacity of lead-acid UPS and SLA batteries\u003c\/li\u003e\n  \u003cli\u003eDIY battery pack capacity verification before deployment\u003c\/li\u003e\n  \u003cli\u003eNiMH AA\/AAA battery capacity testing for RC and hobby use\u003c\/li\u003e\n  \u003cli\u003eEducational electronics lab demonstrations of battery discharge curves\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatible With\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e18650 cells: Samsung INR18650-25R, LG HG2, Panasonic NCR18650B, Sony VTC5A\u003c\/li\u003e\n  \u003cli\u003eLead-acid: 6V 4Ah SLA, 12V 7Ah VRLA (with appropriate load resistor)\u003c\/li\u003e\n  \u003cli\u003eNiMH: Eneloop AA\/AAA, GP ReCyko, Duracell rechargeable\u003c\/li\u003e\n  \u003cli\u003eExternal load resistors: 7.5Ω\/10W or 15Ω\/10W for 1A–2A discharge rates\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003ch3\u003eQ: Does the ZB2L3 include a load resistor?\u003c\/h3\u003e\n\u003cp\u003eNo. The ZB2L3 module requires an external load resistor to set the discharge current. Common choices are a 7.5Ω\/10W resistor for ~1A discharge from a 7.4V source, or a 15Ω\/10W resistor for ~0.5A. The resistor must be rated for the power dissipated during discharge.\u003c\/p\u003e\n\n\u003ch3\u003eQ: How do I set the cutoff voltage for 18650 Li-ion cells?\u003c\/h3\u003e\n\u003cp\u003eSet the cutoff voltage to \u003cstrong\u003e2.75V\u003c\/strong\u003e for standard Li-ion 18650 cells to prevent over-discharge. Use the onboard potentiometer or DIP switch (depending on board revision) to adjust the threshold before starting the test.\u003c\/p\u003e\n\n\u003ch3\u003eQ: Can the ZB2L3 test a 12V lead-acid battery?\u003c\/h3\u003e\n\u003cp\u003eYes. The ZB2L3 supports input voltages up to 12V. Use an appropriate load resistor (e.g., 4Ω\/50W for ~3A discharge) and set the cutoff voltage to 10.5V (standard for 12V SLA batteries). Ensure the load resistor has adequate heat dissipation.\u003c\/p\u003e\n\n\u003ch2\u003ePackage Contents\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e1× ZB2L3 Battery Capacity Tester Module\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eLoad resistor, battery holder, and power supply not included.\u003c\/em\u003e\u003c\/p\u003e","brand":"Keszoox","offers":[{"title":"Default Title","offer_id":46985525330155,"sku":"\u003cnone\u003e","price":9.48,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0677\/1005\/8731\/files\/zb2l3-digital-battery-tester-led-18650-lead-acid.webp?v=1761275124","url":"https:\/\/keszoox.com\/products\/zb2l3-battery-capacity-tester-led-18650-lithium-lead-acid","provider":"Keszoox","version":"1.0","type":"link"}