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The yellow brick battery

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nairb:
These yellow brick batteries.  The name begins with a "M".  I always thought they were longer lasting than some other/cheaper brands and worked well with the basic charging systems on the older bikes.

I have had 2 of these batteries start to fail or not deliver the full power.  They are both about 2 years old.  Maybe there is an issue on the bikes they are on.  Maybe......

Has anybody else noticed any change in the quality of these batteries.  I am needing one for the re5m and at 130+ quid it's not the cheap option.

ta
nairb

SteveW:
Motobatt, they are ok if you keep them connected to a trickle charger.
If you don’t and they go flat they never seem to recover.

I’ve had 3, I wouldn’t have another one.

taysidedragon:
I've got a Motobatt on my 400f. I just trickle charge it occasionally during the winter and never had a problem with it. It's now 6 years old and going strong.
Make sure you buy them from a reliable supplier, there are fake copies out there.

Johnwebley:
I use the Yellow brick

But completely opposite to Steve


They seem to thrive on neglect,

Fully charge every 2 months, don't leave them on a trickle charge



Sent from my SM-A546E using Tapatalk

ST1100:

--- Quote from: nairb on January 29, 2025, 10:09:52 AM ---I always thought they were longer lasting than some other/cheaper brands...
--- End quote ---
;D

--- Quote ---They are both about 2 years old.
--- End quote ---
And that's about what you'll get out of current avail batteries... any brand/MFG... two seasons... maximum... if you're lucky...

I always picked the OEM Yuasa (YTX14-BS, AGM) for my mounts... always...
Back in the 90ies you'd get 5~6 years out of them... always...
During the turn of the millennium something happened... what was that again... ah!... the RoHS Directive...
After that everything went down... I started to get max 2 years on them... (the very same is happening on car batteries BTW...)
A more "modern" gel type?... pfffff... so much internal resistance under load, my GF's V-twin (NT700VA) would barely turn over TDC... :-\

Switched to LiFePO4 (NOCO)... wow!... massive punch; the starter never purred so happily... stable voltage -> clean spark -> instant firing...
And if it really goes flat over the winter/long grounding time: the designated charger gets it back to full within 45 minutes (not 'charge over night' like an AGM...)

I know, it ain't the 'purist' way, but I got sick of throwing > € 160,- on new AGM cells...

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