Jota Battery

Hi Cam

Any phyical damage?

I restarted an AGM by using an old fashined charger that doesnt try and sense the battery V and just pumps out amps, this got the battery to a state where the 'clever' charger could cope and then take over.
 
Only physical damage was where I barked my shin on the footrest while push-starting the bike. The battery looked OK, but was brain dead.

Yep, dumb battery chargers are handy for that. They're just a transformer and rectifier with no brains to get confused.  Unfortunately I drowned my old dumb battery charger when I dropped it into sea water while climbing from a boat onto the jetty. I rinsed it in fresh water and let it dry out for a few days. It worked for about 10 minutes before the smoke escaped.

You can convince a smart charger to charge a dead flat battery by connecting a good battery in parallel with the flat battery so the charger can sense a voltage. After a few minutes the dead battery's voltage will have come up enough for the charger to continue without the support of the other battery.
 
had a Lithium battery here that let go flat for around 2 years, not a thing in it
tried the smart charger and the Lithium charger, neither worked

so hooked up this big old dumb arse charger I have here and turned it on
wow, what a racket it made, sounded like something was going to explode so hid around the corner for 2 minutes, quickly turned it off and then tried the Lithium charger again
it then recognized that there was a battery connected and went through the full cycle

in the end though Lithium battery would not hold charge for more then a month so bought a new one

 
I inadvertently let a Lithium battery go flat (left the ignition switch on overnight) and nothing would resurrect it.
Do the same with an AGM lead acid battery and it'll usually recover.
 
Dellortoman said:
I inadvertently let a Lithium battery go flat (left the ignition switch on overnight) and nothing would resurrect it.
Do the same with an AGM lead acid battery and it'll usually recover.
Click to expand...
There belies the major reason for premature battery failure... whilst the AGM/lead acid batteries will usually recover they will never go back to 100 percent if they have gone flat... the key is never to let any battery go completely flat, keep it charged up and never over charged as this can be a big battery killer also.

I am still not convinced about Lithium for automotive use at present in particular for older machines... they are working damn hard on it but still dont think they are just there yet.
They are starting to find their way into hybrids and electric vehicles but they are not fully mainstream as yet.. I hear ya about cost but that is only one part of the overall picture for OEM's
 
I've always had good runs out of Deka batteries.

They're made in America for Harleys. They have to be powerful enough to crank a Harley engine and tough enough not shake to bits once the bloody thing starts making that flatulent "potato potato" noise. :D
 
You must log in or register to reply here.
Back
Top