Three month old bike- Battery problem

[Skyblue]

I use a Battery optimiser & disconnected it from the bike Friday evening when it was fully charged,come Sunday I was all ready for a ride out & then the bike would not start! So put the charger back on for 2 hours & it started.What I want to ask is when a battery is fully charged it should take weeks to go flat should it not.So what's happening to my bike!

[Rogerborg]

Battery is shagged, it's draining (you have a short or a greedy alarm), or a loose connection stopped it starting, but "healed" itself.

There's really no way for us to tell. Why not invest £5 in a multimeter and find out?
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Biking is 1/20th as dangerous as horse riding.
GONE: HN125-8, LF-250B, GPz 305, GPZ 500S, Burgman 400 // RIDING: F650GS (800 twin), Royal Enfield Bullet Electra 500 AVL, Ninja 250R because racebike

[J.M.]

Three months in your ownership or brand new?

If the latter and still under warranty, get them to sort it

Also a battery shouldn't ever go flat. Not for a few years at least until the battery starts to die.
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2004 R1 & 2018 XSR900

[Skyblue]

It's a brand new bike & it's happened twice now.will phone the dealer today see what they can do & get a multi meter.Thanks for the replies

[Rogerborg]

Zing Ping or Wing Wang?

If you get the multimeter first, you'll be far better placed to make a credible warranty claim. "Battery is reading 10.2V while off charge, so let's replace it" versus "Electrics are a bit not worky, mister."
____________________
Biking is 1/20th as dangerous as horse riding.
GONE: HN125-8, LF-250B, GPz 305, GPZ 500S, Burgman 400 // RIDING: F650GS (800 twin), Royal Enfield Bullet Electra 500 AVL, Ninja 250R because racebike

[JustinParker]

As recommended to me from TaughtToBeCautious in relation to my Varadero that had a battery issue last week:

"Whilst the battery is off the bike, there's a few checks you can do before fitting the new one:

1. Pull all the fuses and test them with an Ohmmeter to make sure they are a dead short across the terminals - I have known this type of fuse to blow, and it still looks good when you hold it up to the light!

2. Put all the fuses back, and with everything turned off, check across the battery cables with an Ohmmeter - it should be less than 1 ohm. If not, pull the fuses one at a time to see what is putting a load on the system.

3. Use the Ohmmeter between the battery earth cable and various earthing points around the bike - Engine Block, Frame, etc. to check for continuity. Check the terminals and bolts where the earth wires are bolted to the engine and frame to make sure they are tight and not corroded.


When you fit the new battery, make sure everything is turned off and connect the Live terminal first, then connect an Ammeter set to the High Range, between the battery Negative terminal and the earth cable. If you get a low reading, check it again on the Low Range.

If you are reading anything more than 0.1 Amps, you have a short circuit somewhere - so don't reconnect the new battery until you have eliminated it."