... offer OEM 3. Long standby time Lithium mobile phone battery for BP-4L:Item BP-4LBattery typeLi-ionStandard Voltage3.7VCharging ... Fake ic, single ic, double icCapacity 400mAh~1200mAhStandby time48 hours~120 hours/depend on battery capacityGuarantee 1 year for AA quality, ... 6 months for A qualityMOQ100 pcsSafety and stableHigh-tech lithium battery, undergoes drop test, smash test and acupuncture test to ...