High Quality Grade A Premium battery: Original Imported, service life of 7 years. Longer lasting battery life, guarding every minute of precision. Superconducting graphene improves performance by 20%, ultra thin steel shell less than 0.23mm, upgrade capacity limit. Stimulate stronger performance of the battery and significantly reduce current loss.
Item Including: 1 X MT920 Battery, 2 X Watch Cover Opening Tools. 1 X Metal Tweezers 2 X Screwdrivers
How To Use: After installing the photodynamic energy battery, you need to use a light source to illuminate the front of the watch glass. When the battery is fully charged, it usually takes 3-5 hours. The light source can be sunlight or desk lamp/flashlight etc.
After-sales Warranty: YUFEEI friendly and reliable customer service, if you have any questions, please feel free to contact us.