Just got this and I love it. http://www.isound.net/shop-by-type/accessories/i-sound-portable-power-16000-mah.html The only problem is I can't, for the life of me find what type of battery it uses. It doesn't say on the box, it's webpage and it didn't come with a manual to my knowledge. Because of this I'm not sure how I should go about charging it. Ive only done one full cycle (let it die then charge to 100%) not sure if it really matter, it probably doesn't have the same battery as my iPad or iPhone If you dont know the battery type, what's the safest way to charge ?