maybe an exaggeration, but not sarcasm....
while it may or may not be ideal, it does work, quite well i might add.
espically in OP's situation
he just neds a little something in the back to keep the voltage up......any small battery would work back there.....either a kinetic 1400, a small YT come to mind....
its just a smarter move to get something small and toss it back there, then to get a lets say a kinetic 2000 or 2400 in the front, and a 1400 in the back.....thats just spending way too much money on it.
ya know?
batteries do last that long if you treat them properly BTW