Confirm my battery diagnosis?

[stopintime]

Trouble starting - starter motor tries to turn the engine over, but can't quite manage to do do. I cleaned connections to and from solenoid and to starter -  didn't affect things.

Screws at battery connections a tiny bit lose - tightened maybe a small quarter turn.

Battery voltage before trying 12.4/12.6. Voltage while trying 10.something to maybe 11

Jumping with a car battery it fires right up.

Then: Idle 13, rising to 13.8/14 at just under 4.000 revs

Now on a charger.


Battery = toast?

[Howie]

I can't tell from your info.  The way to know for sure is fully charge and load test or one of these type testers  https://auteldiagnostictools.com/products/bt506?utm_source=bing&utm_medium=cpc&utm_campaign=Autel%20Diagnostic%20Tools&utm_term=2323130631271801&utm_content=Ad%20group%20%231

If I was a betting man I would go with your diagnosis though.  Oh, Is your battery lead acid or lithium whatever?

[stopintime]

Lead acid. No lithium in my bike, yet.

[koko64]

Choose a new battery?

[stopintime]

I'll probably get a new, but want to test more first. It's 'fine' now that I do daily charges (to make sure my long weekend ride goes well), but want to know how it develops in daily use.
The shop I bought it from says all the numbers indicate 'fine' (ok...), but they will load test it.

[Howie]

I try to replace batteries before they fail.  More than four years, new battery.

[stopintime]

This is 16 months. It's a cheap'ish battery, but should last longer regardless. It has been treated well an used in a bike showing signs of good condition/charging. Maybe they'll give me a return/money towards a Yuasa.

[Howie]

A big advantage with the Yuasa YT12B-BS is they ship them dry, with the acid separate.  Battery life starts the day you activate it, not when manufactured.  I don't know about you side of the pond, but here, often cheap batteries are cheap because they sat on the shelf too long.

[koko64]

A big advantage with the Yuasa YT12B-BS is they ship them dry, with the acid separate.  Battery life starts the day you activate it, not when manufactured.  I don't know about you side of the pond, but here, often cheap batteries are cheap because they sat on the shelf too long.

Very true. You never know how "fresh" some batteries are. I've never seen batteries kept on charge while on the store's shelf. Some shops may charge them for you once purchased, but even that is rare.

[stopintime]

Filled only in Europe now. I don't know why.
Cheap batteries, typically warehouse will have shorter shelf life, larger volume, quicker turn around. Yes?

[Howie]

Maybe, there is only a handful of lead accidents battery manufacturers. 

[stopintime]

Maybe, there is only a handful of lead accidents battery manufacturers. 

,but many spell check apps.

[Howie]

,but many spell check apps.

What the?

Maybe, there is only a handful of lead accidents battery manufacturers. 

I have no idea how I did that

[koko64]

Tired but technically OK batteries may get through summer and test ok in the higher temps, only to not make it through winter. Many times I've told a customer to change the battery in Autumn/Fall.

[koko64]

I try to replace batteries before they fail.  More than four years, new battery.

Tired but technically OK batteries may get through summer and test ok in the higher temps, only to not make it through winter. Many times I've told a customer to change the battery in Autumn/Fall.