I recently bought a Cabanon Venus trailer tent which had been stored for some time, perhaps two or more years. In the storage box I found a small sealed-for-life car battery which I thought must be useless after so much inactivity, however as one who prefers to try things rather than chuck them away, I connected it to a battery charger. After 48hrs, there was some life in it but it wouldn't charge up fully. I then connected a small bulb to it and it lit up, and I left this connected up for another 48hrs before reconnecting the battery charger. After a few spells of this, I connected my Optimate II smart charger and after 24hrs it shows a full charge at last.
Now this could all be a waste of time and the battery might still let me down just when I need it but as it will only be used for powering and interior light, I think there's life in the old dog yet.
I have a couple of Optimate IIs which I connect to my motorcycle batteries when left standing for months and these work a treat.
1. But it would never have a decent load, just a small interior light.
1a. I have no way of trying it with a 10amp load.
2. Yes, that would be Stage 2 after I've discovered how much life, if any, I can get out of the old thing. I have a Halfords Trade Card which gives me a hefty discount on batteries and stuff.
The standard caravan lights can be upto 3 amps, stick them all on and thats probably a 10A load. Then put the waterpump on and see what the voltage is like.
Ah, I have a 2-berth trailer tent with a small plug-in lamp, which I have only just bought and have yet to use for the first time. I intend to live simply ;-) I'll see how it goes anyway and it will be a simple job to buy another battery if this gives up the ghost.
Amazing family weekend with old steam engines, classic car displays, market stalls, and full catering and bar. And camping on site - Save £25 by booking in advance.