Banner Battery Top up - any point?

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Dansuddaby
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Banner Battery Top up - any point?
Discovered my Banner is as dry as a pub in Covid times. Is their any sense in trying to top it up with new fluids and recharge or am I wasting my time? New battery on order from Tanya so just whether a I can keep a second d one spare topped and charged. Thanks all
Roadsport06
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No harm in trying, but why have the cells become dry? Are you using a "smart" battery conditioner, or a "dumb" trickle charger?
Dansuddaby
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Just a dumb trickle charger which is telling me it has a charge but clearly not.

Dan D17SUD​ - Superlight R #62

Roadsport06
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A trickle charger will just keep a current flowing and will cause the water to evaporate away. You need a smart battery conditioner like ctek or accumate, they monitor the voltage and only when it drops does it charge.
Gordon GWF
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I use the small CTEK XS 0.8 which has more than paid for itself by leaving it connected. Just checked my receipts and surprised to find that the current Banner battery I fitted in April 2011, rarely needs topping up and still holds a charge well. Must be due for a replacement soon but will be buying a Banner again for sure.
Dansuddaby
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Ok thanks Gordon - that's good to know. Need to invest in a conditioner unit in that case.

Dan D17SUD​ - Superlight R #62

JonT
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This gets a good reccomendation on SELOC - I've just bought one and works ok. Much cheaper than CTEK etc https://www.amazon.co.uk/Maypole-7423A-Battery-Charger-Electronic/dp/B009A83P1E

Roadsport06
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One other thing Dan, when you come to charge your potentially knackered battery it may need to go on a dumb charger for a while as the smart charger may not detect it as the voltage may be too low. JonT's link is a fantastic price. Also worth carrying a lithium battery booster. Mine has already got me out of bother when I had a battery on the way out.
Curly
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Be careful not to overfill

I did and it leaked acid -  good excuse for anupgrade but definitely not advised...

Roy Blyth
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I haven't topped a battery up since... well, in the days when you always had to top batteries up!

My Banner looks like it needs a top up, but I can't see up to what level? Is there meant to be a marker in there somewhere, or should I just make sure they are all just above the top of the plates?  The Banner website is worse than useless  Confused 

SM25T
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Usually a plastic moulding in each cell to cover, or something hanging down from each fill plug. Do charge the battery immediately after topping up with deionised water.