DAPU cargo. Dead battery or motor?

[badaboum]

Hello guys I have a cargo bike with the usual front DAPU 250w motor. Bike has 6000km on it.

Since last month I feel the bike is having hard time getting me on top of my parking slope.

How can I asses if it is the battery which is dead or the motor?
Because on flat surface ( I know less torque is needed) it behave almost as usual ( at least I don't see the difference)

This is not the first battery of course

Thanks for your help Sherlock team

Cheers

 

[Nealh]

Does the battery cut out at all on the hill climb ?

 

[badaboum]

Hard to say the ramp is not very long but step.
I used to climb it a couple of years ago without any issue.
Getting the voltage of the battery will not help?

 

[soundwave]

when batts get old they suffer from voltage sag to the point the bike will turn off.

 

[sjpt]

Getting the voltage of the battery will not help?

Getting the voltage when not under load won't help (unless there's something seriously wrong with the battery). If the battery is getting past its prime there will be serious voltage loss under heavy load, but that's more difficult to measure.

 

[badaboum]

Any idea how to confirm it's the battery and not the motor? I don't have a problem puttin 400e in the battery but if it's not that but the motor then that would be a loss

 

[sjpt]

What sort of display do you have?
Our tandem display includes a basic 5 bar battery level;
that gives a course idea of voltage (about 2volts per bar)
With a 4 year old 4000 mile battery, if it's on 3 bars and we hit a steep hill it will quickly drop to 1 bar, and a lot less help. We've not had it cut out yet; we don't often let it drop to 2 bars on the level.