10000mAh Solar Charger Portable Dual USB Shockproof Solar Power Bank/ Backup Battery Charger; Solar Powered Phone Charger for iPhone iPod iPad Samsung HTC Blackberry and GPS Tablets Camera (Black) 10000mAh high capacity rechargeable Li-Ion battery built in, compatible with most Apple, Android and tablets. LED indicator shows the charging and discharging process, never worry losing power. Solar is mainly for topping off the unit, we highly suggest charge it via outlet. Do not take solar as primary power resource. Use wall charger at the first three times and make sure to charge at least 10 Hours. Any problem with our power bank, please contact us via Amazon messages or mail us at oceantimesus@hotmail.com with your order number for solutions.