Li-ion mobile phone battery for BL-4S 1.3.7V mobile battery 2. Long standby time 4. Short delivery time, offer OEM. ... ~1200mAhStandby time48 hours~120 hours/depend on battery capacityGuarantee 1 year for AA quality, 6 months for A qualityPriceFOBUS$0.6-1.25 ... , such as keys, coins, etc.6. Keep the battery in a cool dry surrounding if it's standby. Li-ion mobile phone battery for BL-4S