i have been making dry cells with no holes, they are way way more efficient. low amp draw and high output. i use a dell 300 watt power supply for testing with a maximum of 18 amps on the 12 volt.
when i make cells with no holes i can get over 1LPM for less then 10amps@12vdc.
http://www.youtube.com/watch?v=BM_lWCwxTI8
http://www.youtube.com/watch?v=cEkXgZlS8XE