Leisure battery charger advice please

[Highlander]

Hi
Has anyone any recommendations for an economical battery charger that I can use on my caravan battery. I know there are lots to go at but I don't want to buy one without a recommendation.
Thanks

[Polly Fouracre]

I would be interested in this too. The O.H. "charged" ours with a normal charger and it was weaker than before!!