... any color can be available.10. Suit for travel, camping, emergency, promotion gift, advertising gift, eco-friendly products, outdoor, novel gift ... lifespan: more than 600 times; (2)Working PrinciplesThis portable digital device mobile charger adopts high-performance lithium battery, with capacity of ... 500 cycles, the capacity still remains more than 80%) Emergency Solar Charger for MP3, MP4, PDA etc