Hapipola fuel features a Li-Polymer Cell battery type with versatile I/O. The over-voltage and short circuit protection keep your device safe and secure for extended periods of use. Its compact pocket size lets you carry it with much ease and comfort. This power bank works perfectly with all devices including phones, tablets, music players, and other USB chargeable devices. Made using ABS shell with ABS + PC casing material. It makes the body of the power bank more strong and sturdy. Even if it falls, it is resistant to scratches or marks.