finfan, If you got a little user pamphlet with your DVM and saved it, look through it for a brief instruction on "current"measurements" If not go to H Frt and read one there. That instruction will show you that you must unplug one lead from the voltage female socket (at the bottom of the DVM) and put into the current female socket. Now, for battery drain test, the DVM must be "strung" (placed) so current runs through the lead attached to the battery, through the meter, and then through the other DMV lead to ground. Another thing is that a DVM cannot usually tolerate current over 10 amps (the small , cheaper DVMs even less) without blowing a fuse inside the DVM. This is a protection for the instrument. It is very easy to blow the fuse depending upon what the DVM is strung between. When the fuse blows it is easy to become frustrated and quit. Instead, learn to simply remove the blown fuse and replace it with the proper value. Although these little fuses may be sometimes difficult to find , you can do it.
Next put in some time reading about the suffixes used in electronics measurement like amp,milliamp, etc and how they are used with the DMV settings. Try not to put in decimal points while using the suffixes unless they are appropriate (you may be right). For instance your .98 milliamp is a very tiny current value, but 98 milliamps, while small, could need some investigation. This electrical adventure may be frustrating, but seems like you may learn by doing and this skill can be used in many ways. motoman