Features: Replacement Li-ion Battery For Apple Watch iWatch Series 5 40mm Product Description: This internal replacement battery for your Apple Watch is a perfect choice for you if your iWatch battery is not holding a charge the way it did when the device was new. If your battery is getting warm during use or charging you need a new battery or you just want to keep you contacted or the music playing on your Apple Watch. Technical Details: l Battery Type: Apple Watch Series Li-ion Polymer Battery Replacement l CE-/RoHS-Certified for safety l High quality rechargeable battery, Work as Original Part l Compatible with Apple Watch Series 1 l Accessory Parts ONLY l High durability with extra power. Built-rechargeable battery protection circuits safety. With no memory effects over 300 cycles. Instructions: All batteries have been tested before shipment. Our battery is sent out with little or no power. This will ensure that the battery will always charge to its maximum load. Please note battery life is dependent on how much you use your watch, running many applications, using Bluetooth, playing music and videos will use a lot of battery power. Warning: To reduce risk of fire or burns, do not disassemble, crush, puncture short external contacts, or dispose of in fire or water. Compatible with: Apple Watch iWatch Series 5 40mm Package include: 1 x Replacement Battery for Apple Watch