Battery powered pump with "Rechargeable batteries".  Charge the pump at home, then take it with you anywhere to inflate the Water Hammock on the spot.  When charged the pump does not have to be plugged in to Inflate the Hammock - which is great.    No more hand pumping.  This makes inflating the Hammock a breeze, wherever you might be.      

Electric Rechargeable Air Pump for Inflatable Water Hammock