15 Hour Battery LifeRechargeable, battery-powered and portable, Kin features an ultra long-lived LiFePO4 battery. This oversized, high-capacity battery means longer uses between charges and less time spent plugged in. LiFePO4 batteries lasts 2, 0005, 000+ recharge cycles (sometimes over 10 years of use) showing excellent long-term durability. This is 5X the life of standard Li-Ion batteries.