Anti Gravity.
It's 6" tall and 7"x 3 1/2". It weighs about 5 or 6 lbs! And cold cranking is either 680 or 720 AMPS!
I'll have room for it, the new overflow, and the alky pump where the regular battery lived, and save a bunch of weight!
They are very popular with the chopper and drag bike builders, as they are much smaller for the same CCamps, and you can mount them on their side or upside down!
Also, I have NEVER, EVER, taken a hollow "display" automotive battery, and put a baby Li battery inside of it and had room for a 2 or 3 lb. Nitrous tank and solenoid on a street race "sleeper," NEVER! EVER!
But, I AM considering putting my Alky controls pump in there, just to keep my under hood look "cleaner."
TIMINATOR