{"title":"Lithium Ion Battery Pack - 3.7V 6600mAh","handle":"lithium-ion-battery-pack-3-7v-6600mah","url":"/products/lithium-ion-battery-pack-3-7v-6600mah","description":"A high-capacity 3.7 V lithium-ion battery pack built from three 2200 mAh 18650 cells connected in parallel, providing 6600 mAh of total capacity. The cells are spot-welded to a built-in protection circuit that guards against overcharging, over-discharging, and overcurrent.\n\nThe pack includes a JST 2-pin connector (genuine JST, rated for 2 A) for easy connection to compatible charger boards. The protection circuit cuts output at approximately 3.0 V to prevent damage from deep discharge.\n\nKey Features\n\n\n6600 mAh Capacity – Three parallel 2200 mAh 18650 cells\n\nBuilt-In Protection – Overvoltage, undervoltage, and overcurrent protection circuit\n\nJST 2-Pin Connector – Genuine JST plug with colour-coded wires\n\n3.3 A Peak Discharge – 0.5C per cell (1.1 A each)\n\nCompact Form Factor – 69 × 54 × 18 mm\n\n\nSpecifications\n\n\nNominal Voltage – 3.7 V\n\nCapacity – 6600 mAh\n\nCell Configuration – 3× 18650 in parallel (1S3P)\n\nMax Continuous Discharge – 3.3 A\n\nRecommended Continuous Load – ≤1.3 A (0.2C)\n\nMax Charging Rate – 1.65 A (0.25C)\n\nRecommended Charging Rate – ≤1 A\n\nCutoff Voltage – ~3.0 V (protection circuit)\n\nConnector – JST PH 2-pin (rated 2 A)\n\nDimensions – 69 × 54 × 18 mm\n\nWeight – 155 g\n\n\n\nWarning: Use only a LiIon/LiPoly constant-voltage/constant-current charger. Do not use NiMH, NiCd, or lead-acid chargers. Do not short-circuit, bend, crush, or puncture. Never charge or use unattended. Always inspect for damage, loose wiring, or potential short circuits before use. Verify connector polarity matches your charger before connecting.\n\n\n\nNote: This battery pack does not include a built-in thermistor. Charge at 0.2C (1 A) or less for safest operation — lower charge rates simply take longer to reach full capacity.\n\n\nIdeal For\n\nPortable electronics and IoT projects\nRaspberry Pi and single-board computer battery backup\nRobotics and wearable electronics\nAny project requiring extended battery life at 3.7 V\n","vendor":"Adafruit","product_type":"physical","in_stock":true,"options":[],"variants":[{"id":11949,"title":"Default Title","sku":"AF-353","price":47.79,"compare_at_price":0.0,"on_sale":false,"in_stock":true,"available_quantity":2,"option1":"Default Title"}]}