hi jordan,here a few but, by all means not all the answers you seek. 1) by power,do you mean speed? manufactuers,have different lifting speeds, gas and electric.an electric has a constant speed,where gas is controlled by your right foot. 1a) rated cap. is just that. 2) hard running on an electric,you can get"roughly" 6 hours. charger producers are easy to find (you found this site),lol. chargers are purchased on there own,unless it is sold in a pakaged price. in a warehouse setting i prefer an electric,but it all comes down to operater maintaince,when i go out to check a problem on a gas truck,i have to move chains etc. to raise the hood,this tells me the driver is not checking the fluids,etc. on an electric sitdown lift,the battery is right there,under the hood,to check the water,but by all means,a lazy or careless operater would not even check that. bottem line is there are so many answers to your questions, needless to say,i recommend electrics,as i believe you get better life from it,but again,maintenace is the key. mike