Shenzhen Kaka Huakai Technology Co,Ltd

We are offering portable adjustable power bank/power supply for phones/mp3/mp4. features new and high quality built-in li-ion battery large batter capacity. 4000mah, 3 5 times as large as common cellphone battery excellent charge performance. Can reach to 70 - 80% of full capacity after 500 times charge-discharge circulation intellegent self-protection system, protect the battery from overcharge, overdischager and overcurrent easy to charge with data cable specifications input: dc5.0v 650ma output: dc5.4v, 500ma battery: li-ion battery 4000mah size: 3.9" x 2.4" x 0.5" weight: 125g battery longevity: more than 500 times charge-discharge circulation self-discharge: < 0.05ma screen: made of 4 led lights note: you could not charge the battery and charge the solar charger at the same time. Please fully charge the solar charger with the sun or computer first, then connect the solar charger with your phone to charge the phone battery.