Battery specifications: 1> Rated Capacity:40mAh 2> Size:4mm(H)x12mm(W)x15m(L)±2mm 3> Operating Voltage: 3.7V 4> Charging voltage limit: 4.20V 5> Discharge voltage: 3.0V 6> Charging cut-off current: 0.02C 7> Standard Charge: 0.5C) 8> Standard Discharge: 0.2C 9> Maximum Continuous Charge Current: 1C 10> Maximum continuous discharge current: 1C It can not be used for any drone or other aircrafts. 11> Operating temperature rangeCharge: 0 ~ 45℃ Discharge: –20 ~ 60℃ Storage temperature range: -20 ~ 60℃ 12> Weight:2g 13> It can not be use for any drone or other aircraft ! Features: 1> 100% brand new and high quality 2> It can be recharged repeatedly 3> Built-in protection circuit PCM for prevent over charging or over discharging4 x pcs 3.7V 40mAh 401215 LiPo Rechargeable Battery For Mp3 Bluetooth Recorder40mAh 401215 Description:We provide tracking number for reliable shipping High capacity for Mp3,Bluetooth,video pen other deviceFeatures:100% brand new and high qualityVoltage: 3.7vCapacity: 40mAhSize: 4mm(H) x 12mm(W) x 15mm(L)Weight: 2g/pcsIt can be recharged repeatedly Built-in protection circuit PCM for prevent over charging or over discharging voltage: 3.7 V ,1C discharge ,fast charging: 1.0C: 0.5C ,Standard charging method: 0.5C CC (constant current) charge to 4.25V, then CV (constant voltage 4.2V) charge till charge current is less than or equal to 0.05C;The maximum charge current: 1CMaximum discharge current: 1CDischarge cut-off voltage: 2.75VThe discharge temperature: -20 degrees C~+60 degrees CCharging time: 2-4hrs (standard); 2hrs (fast)Protection function: over charge, over discharge, over current, short circuit protection, over temperature protection Package included:4 x pcs 3.7V 40mAh Li-po Polymer Lithium Rechargeable Battery Pack . 401215 . PaymentDelivery detailsTerms of salesAbout usContact usPayment •We only accept PayPal. •Bulk quantity, please contact us for discount. Delivery details •Order will shipping out in 24 hours since payment complete.(except weekend days)•We ship to worldwide with tracking number.•We ship to the confirmed address provided by PayPal. Before you pay, please make sure your address in PayPal matches the address you would like us to ship to.Terms of sales•All items are brand new•If you received a defective or not as description item,please do not open dispute or leave negative feedback directly,you only need to send us a picture to show that,we will free resend or full refund as soon as we confirm,you also need not to return item to us•100% Satisfaction guaranteed or 30days money back warranty after received itemAbout us• We are professional battery seller.Contact us•We will reply your message within 24hours(monday to friday) Type3.7v Lithium PolymerBrandEHAOModel40mAh 401215MPNDoes not applyChemical CompositionLithiumQuantity4pcsCountry/Region of ManufactureChinaCountry of ManufactureChinaUPCDoes not applyVoltage3.7VBattery Size4*12*15mmAmp Hours0.04AhApplicationLow Drain DevicesManufacturer Warranty1 YearCustom BundleNoUnit Quantity1Unit TypeUnit