golly

ok thanks guys thats a big help and thanks for the welcome

hi im new to all this, i have just got a car with a ac/dc adaptor model sy- 09025-bs input 240-50hz,100ma output9v-250ma-2.25va running 2 battreys a ni-mh 1800 7.2v and a ni-mh sc5000mah 7,2v it says in my hand book that i have to charge them for 10 hours first time but thats all it says ? how long after that ,when it goes flat i had run the 1800 for about 20 mins and it went flat,not long at all is this about right time for a 1800 on a 550 motor brushed ? i have not tryed the 5000 yet ,

i think i put this in the wrong place