This is an unfair question, you need to consider the temperature they are used in, the temperature you store them in, believe it or not sometimes batteries discharge very quickly even when sat on a shop shelf.How long should a pair of 9V Duracell batteries last me in my EvoII hopper? The set i currently have ran out pretty quickly which is a bit gutting at £2 a battery. How long do they usually last people?
But if you have a relatively good set of batteries you should get around 5000+ balls through it.This is an unfair question, you need to consider the temperature they are used in, the temperature you store them in, believe it or not sometimes batteries discharge very quickly even when sat on a shop shelf.
There are too many factors involved in the shelf life of a battery to give a proper answer.
It pays to use quality 9Vs (Duracell/ProCell, Energizer etc.) You can get them in packs of ten at a reasonable price on-line or from ebay or somtimes there is a group buy. Lesser brands might be OK for the smoke alarm at home for 6 months, but have no place in a loader!Urgh doubt my lot even lasted 2000