Ideal for the person on the go. These digitally printed or engraved power packs fit perfectly into a purse, bag or pocket. No they wont jump start your car but they will get you out of trouble. Perfect for travelling. Digitally printed power pack/battery 3.8v_2500mAh. Power bank comes with both the Lightning/Apple Adaptor and Android/Samsung Adaptor and Timber power pack/battery 3.8v_2500mAh with engraved tree.