Might seem a daft question, but ....

[Spud]

Below 9v when cranking and time for a new battery.

It dropped to about 8.8 VERY briefly cold cranking but mostly around 10 volt Mark.
I've got a new battery coming anyway so I'll stick it on and see what happens, I'll always have a spare !!

 

[King Rat]

If, it is fully charged between 13.8 and 14.4v the only true way to assert actual voltage is a drop test under full load.

I've just replaced the odyssey on my 12gsa with a jmt lithium battery, cost is roughly similar but weighs next to damn all compared to lead acid or agm.

Roughly similar?

Original BMW Gel battery £69.00
Odyssey for R1150GS £87.60
Motobatt for R1150GS £78.00

JMT Lithium for R1150GS £179.00

When I was at school, that would have made it MORE THAN DOUBLE THE PRICE, rather than 'roughly the same'. You must have had a different maths master.

 

[Tractors are go]

Not if you've got an R1200gs, which I have. Although, they can be purchased for considerably less than £179 on ebay.

Sorry for any confusion.

Sent from my GT-N7105 using Tapatalk

 

[ossa eck]

Below 9v when cranking and time for a new battery.

Look after that pms, good piece of kit .
Had mine for about 15 years now .

 

[King Rat]

Not if you've got an R1200gs, which I have. Although, they can be purchased for considerably less than £179 on ebay.

Sorry for any confusion.

Sent from my GT-N7105 using Tapatalk

You're right, you can - and the 1200 battery is considerably cheaper than an 1150 one - but the JMT is still much more expensive. I would be interested to see how long it lasts though. I am still dubous about Lithium batteries with all these different things catching fire when charging! I think I might get one of those Motobatt jobbies next time though.

 

[Tractors are go]

Main thing is checking output of charger. Not more than nominal 14•5v and 3•6A, this allows for any excess output (+/- 10%)

They have button on top which can show charge state, which is extra cool !

Sent from my GT-N7105 using Tapatalk

 

[Spud]

They have button on top which can show charge state, which is extra cool !

Excuse my ignorance...... What has ? !

 

[Spud]

Ah the Motobatt.... Ignore me !!

 

[Slipperyeel]

Below 9v when cranking and time for a new battery.

Smug. What kind of dvm have you used? I like the graph output. Perfect for the starting test to show the difference

 

[King Rat]

My battery test is the starter button. If it starts, all good. If it doesn't, the cold start ramp is required (the hill ) and hopefully the length of ride will be sufficient to put some sparks back in the box.

 

[Smug]

Smug. What kind of dvm have you used? I like the graph output. Perfect for the starting test to show the difference

It's a Bosch PMS100 Scopemeter. Basically a Fluke 98 badged up by Bosch with automotive software.