A dying battery will spin the engine but not produce the required spark, and will then die as it can't maintain the cranking amps.
As you've found it may have enough left to bump start as its not using all its power on cranking.
If the battery was good, you'd be able to crank it over loads more before it started to fail.
What with your previous issues I think this confirms you just need to get a new battery.
As you've found it may have enough left to bump start as its not using all its power on cranking.
If the battery was good, you'd be able to crank it over loads more before it started to fail.
What with your previous issues I think this confirms you just need to get a new battery.