trolley pump problems

[AW Services]

Or @Apw It could be , as i found  out, with my old trolley.

The cold weather can potentially have an impact.

Yes many battery chemical make ups such as Lead acid are affected by temperature change, at lower temperatures the battery cells can deplete and lose their charge and stability. Lipo - lithium polymer are worse as they need to be kept within a temperature range or they will not charge also