Compact 18650 Internal Resistance and Capacity Tester Key benefits Quickly identify weak or flat 18650 cells by measuring both internal resistance and capacity on a single channel. Helps you decide which cells to recycle, recondition, or keep for assembly. Builtin individual charging and automatic cycling (up to 9 charge/discharge cycles) enable basic conditioning and verification without additional equipment. Uses a DC twowire method for internal resistance testing, providing straightforward, repeatable measurements for consistent comparisons. What it does (functions) Singlechannel measurement of internal resistance and capacity. Individual charging capability for one cell at a time. Automatic mode performs up to 9 charging/discharging cycles. Internal resistance measured via DC twowire method. Compact battery holder designed for 18650 cells and suitable for flat battery measurement. Compatibility and form factor Compatible specifically with 18650 lithiumion cells. Compact holder accommodates flat 18650 batteries for stable, repeatable contact during tests. Small footprint makes the unit convenient for benches, workstations, or field checks. Performance and practical value Simplifies routine cell screening and capacity verification with onechannel measurements. Automatic cycling supports basic conditioning and capacity stabilization tasks without manual intervention. DC twowire resistance testing provides a simple, consistent approach for internal resistance comparisons. Typical applications Battery pack assembly: screen incoming 18650 cells for capacity and internal resistance before installing them in packs. and maintenance: diagnose flat or degraded 18650 cells from flashlights, power tools, or consumer electronics to determine whether a replacement is needed. Hobbyists and small labs: condition and verify cells with individual charging and up to 9 automated charge/discharge cycles. What makes it stand out Focused singlechannel design for straightforward, reliable testing. Automatic multicycle capability for conditioning and verification without extra controllers. Compact, purposebuilt holder for stable contact with 18650 flat cells. Specifications (functional) Singlechannel internal resistance and capacity measurement Individual charging supported Automatic mode with up to 9 charge/discharge cycles DC twowire internal resistance test method Compact holder for 18650 batteries, suitable for flat battery measurement