I like how portable it is because you just have to make sure to keep it charged but in case you didn't have time or you just forgot, it comes with the lighter plug power source as well, i like that!, and if you are out on your bike and don't have an external power source you can use the battery, this cordless Air Pump is really handy for me, another thing i like is that it shows you the pressure that your tires have in that moment, i recommend it!.