Battery charging

Went to start work yesterday and discovered that my van battery is flat, can I use my leisure battery charger to charge my van battery? To be clear this is the battery that powers the van not the one that powers my pump.

Should like you need to replace the van battery.

I bought a cheapo battery charger recently from Halfords for £20 in the sale that will charge both leisure & normal batteries.

This is the one I bought in the sale that has gone back up to the normal price now http://www.halfords.com/motoring/bulbs-wiper-blades-batteries/car-battery-chargers/halfords-fully-automatic-battery-charger