the airbed/pump is a couple years old, and i used it for 3 times when i
went for camping trip. since i'm going for another camping trip next
week, i took it out and tried to get the gear ready. however i found
out it doesn't hold charge anymore even though i charged for a
significantly period of time.

i noticed inside the pump it has 5 white-colored batteries connected in
series, one of them marked with 'Propine 6V 1.6A 0201', i did a search
and found this online,
http://www.allelectronics.com/cgi-bi...-SC&type=store,
might be just what i need, only problem is it will cost $20+ to buy a
5-pack, i could buy a cheap pump at walmart for less than $15.