I use one of theses for my pf trolley battery http://www.halfords.com/motoring/bulbs-blades-batteries/car-battery-chargers/halfords-fully-automatic-battery-charger
I just cut the croc clips off and replaced with the connector plug that came with the old pf charger that broke. I also bought another one not long after and left as is so could charge other batteries up using croc clips as got feedup having to keep swapping them over.
It's also handy I've found to keep in the van for longer exterior cleaning jobs as can be plugged into customers power to recharge at the same time can run the pf trolley pump as it's charging. I'm usualy using customers power anyway for the gutter vac so makes no odds really. Doing this has also got me out of trouble more than once when I've forgot to charge the battery up and it dies whilst out and about.
Wouldn't recommend that charger, I was about to change my battery as it wasn't lasting over the day even though I was
charging it every night with that same charger.
Went back to my old cheap job and the battery has been grand ever since, I get the feeling it was reading my battery as fully
charged and stopping the charge too early.
I also get the feeling that it was charging the battery too quickly as I was forever topping the battery up with pure something
I haven't needed to do since going back to my old charger.