Also.. The type and age of your battery, as well as how it is being charged, will have a lot to do with how long it will last. Older batteries that have been run down a few times, or are sulfated, will have as little as 1/2 the life as when new.
And, if your Scamp
hasn't has had an updated power chassis installed, it's battery may not do as well as possible with a more modern charging system.
For starters you need to get a battery monitor that accurately reads in 2 decimal places so you can monitor the actual remaining charge while in use.
BTW: If you still have standard lighting
in your Scamp
, those can be battery killers, look for some LED's if battery life is critical.
Bottom line, with so many varibles, ya gotta try it to find out.