Buggered battery?

[Slacker24seve...]

Like a fool I left my ignition on and came back to a dead bike.

Plugged the battery into an Oximiser (TM) and it's been showing the yellow light - which the instructions tell me means low charge, will recharge and optimise - for well over the 10 hours it should have taken. At no point did it show the orange or red 'you've broken it' lights. It's a 6 month old Yuasa.

Is it kaput? I don't want to take it off and test if that will ruin the recovery process.
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[P.]

I'd have got the bike jump started and ridden it for an hour to push something back in.

That or pop on a 2Ah/4Ah charger overnight.

[Slacker24seve...]

[P.]

I have a "Hi/Lo" charger, its fairly dated but gives 100% power for an hour then drop down to half for its remainder. Really decent and has recovered a lot of what I would consider past it batteries

[MattEMulsion]

Modern gel batteries don't like low states of charge and letting it go totally flat will have not done it any favours at all. You may be able to bring it back to life if you stick it on a 'proper' charger for a couple of hours to give it a bit of a boost back to life. Then stick it back on your Oximiser to get it back up to its normal state of charge.
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Yamaha YZF-R6

[G]

A quick google shows an 'oximiser' with a maximum output of .6A - and it's going to reduce output as it gets more charged, so I'd expect it to need more than 10 hours unless it's a diddy battery.

Any moddern charger should be constant-voltage, meaning the battery will draw what it needs up to the maximum the charger can offer.

HOWEVER, batteries can draw enough to boil off some hydrogen/oxygen - even 'maintenance free' sealed batteries - the batteries just need to be topped up with some water if this happens, but may be more of an issue for AGM (Forget the exact details, I generally avoid gel/AGM given the choice.)

Older chargers, like the one that it sounds like Paddy has, work on a constant current, which means the voltage can get too high - so after a set period they either turn off or reduce the current, so the voltage doesn't stay high.

[evoboy]

Buy a new battery.

You just know itll give up at the most perfect moment.
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[Pete.]

A 10 minute blast on a standard charger should lift the voltage enough for the trickler to take over. I wouldn't risk much more than that. Also try re-setting the oximiser by switching it off and on, sometimes the sensing circuit gets confused.
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a.k.a 'Geri'

132.9mph off and walked away. Gear is good, gear is good, gear is very very good

[map]

Late to the thread but...
IMHO to recover the battery you'd be best trying the likes of the Optimate/Accumate that are designed for this (IIRC WEMoto also sell a similar device).

I have not heard good things about the Oxford product. I believe as a charger they're ok, but not designed to go into recovery cycles like the Optimate and type like it.
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