.Voltage of single cell: 3.7V .Nominal voltage after battery pack combination: 7.4V .Capacity of single battery: 2.6Ah .Battery combination mode: 2 strings and 2 parallels .Voltage range of battery after combination:5.0V~8.4V .Battery capacity after combination: 5.2Ah .Battery pack power: 38.48W .Battery pack size: 40*40*68mm .Maximum discharge current: < 5.2A .Instantaneous discharge current: 10.4A-15.6A .Maximum charging current: 0.2-0.5C .Charging and discharging times: ＞ 500 times1. Sufficient capacity: using domestic and foreign brand raw materials, sufficient capacity, low internal resistance, and stable voltage 2. Stable performance: long cycle life, high energy density, wide operating temperature range, stable discharge voltageBrand-name PartsOrigin Distributorships OfferedExperienced StaffGreen ProductGuarantee/WarrantyInternational ApprovalsMilitary SpecificationsPackagingPriceProduct FeaturesProduct PerformancePrompt DeliveryQuality ApprovalsReputationServiceSmall Orders Acceptedfactory pricegood qualityassurance1. Technology-With more than 20 years of battery manufacturing and automatic production line, xuanli can guarantee our products better products. 2. R&D-Experienced R&D team with over 20 engineers for supporting ODM requirements 3. Safety-Various tests are done at XUANLI to ensure the safety of our products for our customers. 4. Certificates-ISO、UL,CB,KC certificated. 5. Service-XUANLI has a professional sales team to provide professional project solutions and after-sale services.  Do not submerge the battery in the water. Do not mix fresh batteries with used batteries. Do not mix batteries with metal stuff together. Do not insert batteries with the (+) and (-) reversed. Do not use Efest batteries with defective E-cig mods. Do not disassemble, dispose in fire, heat or short circuit. Do not put the battery in a charger or equipment with wrong terminals connected.