restoring/maintaining sealed lead batteries

[ShropshireSam]

I have various sized sealed l12 V lead batteries and have an Oxford trickle charger. I keep all batteries fully charged and trickle charge them occasionally when not in use to keep them topped up.

 

This year I seem to have had three batteries go faulty where they will not charge. When put on the charger the reported voltage jumps between about 6 V and 16 V with no charge going in - charger goes to "maintain" function as if batteries were fully charged.

 

Any ideas if these can be recovered and what I should be doing with the batteries to help maintain them for longer?

 

If I can't recover them then I need some replacement flapper batteries...looking at the shooting warehouse 4.5 Ah ..... any good??

[motty]

Your batteries are ###. I have never trickle charged any of my batteries.

These days I go for 7ah batteries for flappers, and 20-22ah for magnets.

[Paul1440]

As motty says they are goosed. Fleabay or if you want them more quickly a trip to Maplins.

Pretty off the self item. Used in rechargeable tourches and house alarm as back up. You might be surprised how cheap they are compared to the specialist supplier.

I nearly scrapped a High power tourch due to the xost of a replacement battery from the torch maker. Got thecsame battery from maplins at a fraction of the price and I could have gone even cheaper online.

[mossy835]

so would a 4.5 6 volt, battery be ok for a magnet, how long would it last.