Product Name: 18650 7.4V 4400mAh Emergency LED Light Smart Headphone Lithium Ion Battery Pack Model NO.: MC-18650-2S2P Electrolyte: Li-ion Usage: Remote Control Boat, Remote Control Plane, Remote Control Car, LED/Flashlight/Searchlight/Powerbank, etc Standard Voltage: 7.4V Rated Capacity: 4400mAh Accessories Type: with PCM/Wire Size: 20*38*135mm Discharge Rate: 1c Rechargeable: Chargeable Connection Mode: Parallel Connection Type: Lithium-Ion Battery Pack Cell: 18650 3.7V 2200mAh Cell Size: 18*65mm PCM: Yes Wire: Can Be Customised Connector: Can Be Customised Charge Current: 0.2c(880mA) Discharge Current: 1c(4.4A) Peak Discharge Current: 2c(8.8A) Cycle Life: 500 Times Warranty: 1 Year Trademark: Mica Transport Package: Standard Export Package Specification: battery with PCB/wire Origin: China HS Code: 8507600090 Product Description 4SpecificationItemsParameterBattery modelMC-18650-2S2PNominal voltage7.4VMinimum capacity4400mAh@25ºCCharging voltage8.4VDischarging cut-off voltage6.0VStandard charging0.2C /8.4VMax charging1.0C /8.4VStandard discharging1C/6.0VMax dischargingcontinuous discharge1.0C/6.0Vnon-continuous discharge2.0C/6.0VOperation voltage6.0-8.4VOperating temperatureCharging: 0°C ~ 45°CDischarging: -20°C ~60°CStorage (At 50% SOC and specified temp,recoverable capacity in % vs time )-10ºC~25ºC(12 months ≥85% )-10ºC ~45ºC(6 months ≥85% )-10ºC~55ºC(1 month ≥90% )20±5ºC is the recommended storage temperatureVisual InspectionThere should not be any remarkable scratches, cracks,bolts, cauterization, deformations, swelling, leakageand so on the surface of the cell.Warranty12 monthsCompany ProfileMica Power Co. Ltdwas established in 2009. Our management team has more than 15 years' experience in battery business. Facility Aare: 15000 square meters; Employee: 1000.We specialize in manufacturing and exporting lithium-polymer batteries, lithium-ion batteries, LiFePo4 rechargeablebatteries, rechargeable batteries for 3C consumer electronics such as TWS earphone,Bluetooth speaker, flashlight, POS machine energy storage system, power tool, BMS and all kinds of PCM for batteries and OEM/ODM battery packs. We also support customers with an outstanding service and a customized POS concept.CertificatePacking & DeliveryTo better ensure the safety of your goods, professional, environmentally friendly, convenient and efficient packaging services will be provided.FAQ1,Q: What's the main product in Mica?A: Rechargeable LiFePO4 battery, Li-ion, Lipo battery and power battery pack.2,Q: Do you have any protection for battery pack?A: Over-charge protection Over-discharge protection Over current protection Cell balancing function Over temperature protection3,Q: What is over discharge?A: After charge, test the batteries' initial state. When the batteries are normal, discharge to 0V at 0.5C. Observe changes in battery appearance4. Q: Can I have a sample order?A: Yes, we accept sample order to test and check quality. Batteries can be made as require.5. Q: Do you have MOQ limit?A: Yes, we have MOQ limit for mass production, but it depends on battery model. Please contact us for details.6. Q: How about the lead time?A: Samples will takes 5-7 business days. Mass production will takes 25-30 days. It depends on quantity.7. Q: How about shipping and delivery time?A: Generally, battery will be shipped via Express, such as DHL, TNT, FedEx and UPS, delivery time is 3-5 business days. Or DDP service, delivery time is 11-15 business days. Airline and sea shipping also available.8. Q: What about after-sale service?A: We will offer you 1-5 year guarantee. If there are any problems, please inform us, we will offer you positive solutions.