[Specification] Type: Li-Polymer, Voltage: 3.7V, Capacity: 1000mAh / 3.70Wh, Dimension: 55.00 x 39.00 x 5.38mm,Weight:21.6g [Compatible models] - Brand new battery replacement for JBL Clip 3, Clip 3AN, Clip 3SAND, L0721-LF, Please find more compatible models in the product description. [Easy Installation] - Easy to replace, most people can do it by themselves, perfect for replacing your old batteries. You can also choose this battery as a backup. [Safety Ensured] - Effectively protection Over-charge,over-discharge,over-heat,over-current & short-circuit protection. [Trustworthy after-sales service] - We provide 12 MONTHS WARRANTY to our dear customers. if customers not satisfied with our product in 14 days,please feel free to return replacement part for refund.