Compatible model: For JBL Partybox Encore Essential Part No.: GSP-1S2P-F5A Specifications: Voltage: 3.7V Capacity:5200mAh/6800mAh Use:Speaker Battery Size:71.60 x 38.45 x 20.00mm Li-ion Battery Important: 1 100% real capacity and Newest battery.New batteries must be FULLY CHARGED and FULLY DISCHARGED 2 to 3 times, before being FULLY CONDITIONED. 2 We are offering the original quality and 1 year warranty, If you are not satisfied do not leave negative feedback in retaliation for a defective product or something you were not expecting.Pls contact us !!Customer satisfaction is our top priority. 3 W holesale seller are warmly welcomed.If you order mixed models , Pls contact us ahead. Price will be more reasonable! If you can'treadEnglish,ple ase enterourstoretochooseyour country language. Please Note: > The battery must be fully recharged before use. > A temporary short capacity of new battery will be resulted from not used for a long time, it is normal, the total capacity will be reinstated via used for 3-5 times. >New battery When first get the battery,useit out,chargefor5hours for the first three times, use it out again, then it only need to charge about 5 hours for normal use. > Do not use inferior charger to recharge this battery in case of damaging the battery. > Do not disassemble or change the structure of the battery. > Do not put the battery in the charger too long. > Do not expose the battery to moisture and water, do not put it in high temperature environment. > Do not impact the battery. > Put it beyond the reach of children. > The best storage temperature is 20C--5C GoodService AboutShipping: We will send the parcels within 48 hours after buyer`s payment is verified. Send items with online track,Tracking information is available within 5-10 days. Warranty: We promise warranty for quality in one year and we will repair it free of charge. The returning shipping should be customer. Received the old items,Thewill be immediately send one new items. Feedback: 1. If you are satisfy with the deliver goods, please kindly help to leave positive feedback and we will do the same for you.