[john63.]

Keeps flashing L which is low but sometimes trips out and flashes U battery been tested and is ok any suggestions

[Don Kee]

Yeah, your battery is taking charge (hence it showing ok on the 'test') but isn't holding charge

I take it that it works for a while then later in the day starts flashing 'L'?

How olds the battery & whats its usage like?

[john63.]

10 months old

[john63.]

Is it battery or controller both 10 months old

[garyo76]

I am having exactly same problem at the moment. Controller is a couple of years old, batty is 5 months old. All I can think is that the controller takes a small charge from the battery even when it is not in use so weakens the battery enough for the controller to not think it has enough charge.
http://www.williamsonpumps.com/ekmps/shops/wpltd/resources/Other/varistream-digital-vsd6-user-guide-may-2011.pdf

[Dave Willis]

I've had batteries go at around nine months before - particularly the 75ah ones.

[Jamie Thomas]

I use these controllers and they take a charge from the battry constantly even when turned off. i now have crocadile clips on the wires that go to battry and just disconet one when im not using it.

[Don Kee]

10 months old

Not the most indepth answer, so...

Have you tried another battery and what ah is your current battery?

[john63.]

Something draining battery fully charged yesterday half charged today any ideas

[Clever Forum Name]

They are awesome controllers! Even when OFF they drain power.  I had to fit a switch to kill the power to the controller. I ripped it out and binned it in the end. Probably one of the worst controllers I have ever had the misfortune of using.

Battery sounds f***ed TBH.

[john63.]

How long does a leisure battery normally last obviously using it a lot but not had it a year yet

[Dave Willis]

If it's cheap, small and your charger is basic and you charge it every night then not long.

[Clever Forum Name]

I killed 3 leisure batteries in 18 months. All 75-95AH range.

I had a split charge relay wired up and I don't know if it was that or just poop batteries.

Current two are on the way to being two years ok.

115AH numax. Grippa split charge system.

Bench charged em 3 times in 2 years.

My electric reel pulls nearly 20 amps and my round is compact. So very happy with performance.

[tony day]

Ladders? 

[Jamie Thomas]

Take the battery to Euro car parts do a free battery test. You may have dead cells

[Mike #1]

At what voltage does your controller shut down to protect the battery ? , Have you been running your battery flat on a regular basis , resulting in knackering your battery .

A true test for your battery would be test it whilst you have the pump running to see if the voltage drops off , It happened with a car battery of mine years ago when battery was tested without engine running everything was ok but within 30 seconds of testing with engine running the voltage dropped off = knackered battery .

[john63.]

Tested battery with pump running dropped a little bit not much though I'll go to euro parts this week

[Dave Willis]

Wouldn't bother. They will charge it up, take a reading of the voltage and tell you it's fine. The fact that it runs out of charge doesn't concern them. I've  never managed to get one replaced yet under warranty.

[john63.]

Thing is don't know if it's controller or battery

[Dave Willis]

Battery. If it's fine at the beginning of the day then plays up later then it has to be the battery running down. The controller is telling you it's under voltage then will turn itself off eventually. You get home, charge the battery up and everything is fine again.
That's how batteries go - the more charging cycles they have - the faster they deteriorate. The colder the weather gets the worse they become. The cheaper the battery the quicker they wear out generally. Deep cycle leisure batteries are supposed to be better than a car battery for our needs but I've tried both with little difference. Get a quality charger too.