PLS CONFIRM DEVICE MODEL --- The battery repair kit contains the instruction to guide you step by step installation, and we have professional engineers to answer all your questions about the repair process. Please verify your old battery part number and phone model before purchasing this replacement battery. Compatible with iPhone SE 2016 4.0-inches (A1662 A1723 A1724). NOT FOR iPhone SE 2020/ SE 2022 BEST BATTERY PERFORMANCE --- We do not hesitate to high cost, using the latest smart IC chips, excellent circuit boards, grade A+ rated battery cells on the market to manufacture this battery, offers good performance rate and high conversion, ensure longer battery life(1000 cycles) and high-speed, efficient charging. Up to more than 24 hours of long lasting time with normal use, and keep your iPhone going hours longer with heavy use. Bring your battery's life back to glory and save the money! HIGH CAPACITY BATTERY --- Our iphone SE1 2016 replacement battery is made of high quality li-ion polymer battery cell, the advanced technology makes this SE battery capacity up to 3500mAh, more power than standard 1876mAh battery, up to 1000 highly efficient charge cycles are available. Brand new 0 cycle battery cell capacity is upgraded to store more power, bring more standby time, increasing battery life and reduce your recharging times. Same charging time but more use time! SAFETY TESTED BATTERY CELLS --- Each A1662 battery for iphone SE 2016 replacement is manufactured and tested under strict quality control standards. Build-in smart IC microchip to prevent over-charging, over-discharging, short-circuit and over-heating for safe and prolonged use. Voltage protection and current protection for safer operation for both user and devices. Made of high-quality materials and strict quality inspection are our best promises to customers!