{"title":"Smart Charger for 18650 4.2V Li-ion battery","handle":"smart-charger-for-18650-4-2v-li-ion-battery","url":"/products/smart-charger-for-18650-4-2v-li-ion-battery","description":"A 4-slot smart charger for 18650 and other cylindrical Li-ion rechargeable batteries. Each slot operates independently, so you can charge batteries of different sizes and charge levels simultaneously. USB powered for convenient use with any standard USB power source.\n\nBuilt-in safety features automatically stop charging when batteries reach full capacity (4.23V cut-off), protecting against overcharging and extending battery lifespan. LED indicators show charging status at a glance — red for charging, green for fully charged.\n\nKey Features\n\n\n4 Independent Slots – Charge different batteries simultaneously\n\nAuto Cut-Off – Stops at 4.23V to prevent overcharging\n\nLED Status Indicators – Red (charging) / Green (fully charged) per slot\n\nUSB Powered – DC 5V input, 1–2A via standard USB\n\n1000mA Per Slot – DC 4.2V output for efficient charging\n\nCompact & Lightweight – 90 × 30 × 122mm, just 106g\n\n\nCompatible Battery Types\n\n18650, 18500, 18350\n16650, 16340\n14650, 14500\n10440\n\n\nSpecifications\n\n\nModel – BH-042100-04U\n\nInput – DC 5V, 1–2A (USB)\n\nOutput – DC 4.2V, 1000mA per slot\n\nCut-Off Voltage – 4.23V\n\nDimensions – 90 × 30 × 122mm\n\nWeight – 106g\n\n\nIdeal For\n\nCharging 18650 batteries for torches, power banks, and electronics\nMaker and robotics projects using Li-ion cells\nMaintaining spare batteries for portable devices\n\n\nPackage Contents\n\n1× 4-Slot Smart Li-ion Battery Charger\n\n\n\nNote: Batteries and USB power source not included.\n","vendor":"Little Bird","product_type":"physical","in_stock":true,"options":[],"variants":[{"id":192,"title":"Default Title","sku":"LB-LS4126","price":9.0,"compare_at_price":14.0,"on_sale":true,"in_stock":true,"available_quantity":118,"option1":"Default Title"}]}