Batteries
Road Warrior
Joined: Nov 2014
Posts: 1,962
Likes: 140
From: NY
Battery
I had this battery in my prior 09 flhtcu that spun it over fast hot like the plugs were out & lasted the 6yrs I had it when I sold it so dont know the full Srvc life it had.
The prior battery was a big crank/DEKA type 400cca AGM that lasted approx 3-3.5yrs & it struggle to hot start the bike at times like post fueling up in summer temps where the factory activated 500cca yuasa battery shined:earned its additional cost over the big crank/delay 400cca battery.
kero in mind when a new 400cca battery weakens over its life like for ex 1.5-2yrs later from 400cca to 300-325cca the larger yuasa 500cca battery weakens to 400-425cca over 1.5-2yrs still having 100 more ccas avail to restart a hot hd vtwin np.
hsppy motoring.
Btw, the basically stock 25k mile 2013 Electra-glide limited I just bought has a brand new Hd AGM battery rated at I think is 410 or 420ccas does have a little hesitation at times spinning the motor over hot like post fueling up in temps above 78-80 deg. Thats with an Ultracool twin fan assist oil cooler,love jugs mity mite cooling fans & Dkcustoms tank lift kit keeping the TC103 motor nice & cool. Before I installed the 3 cooling mods the oil temp ran 245-250deg + in 80-85deg with hot idle oil pressure at 2 psi & at cruise/2,500tpm 25psi to now with the 3 cooling mods in same temps with same oil & idle speed idles now at 13-15psi & at 2500rpm cruise at 30-31psi which is a great improvement for sure. Oil temp Im sane heat cond now run max of 220-225deg but now runs 195-210degon avg in 80-85deg outside temps vs the 245-250deg+ temp the oil used to run before I installed the 3 cooling mods.
Oh,forgot,I also installed DKs external crankcase breather system too!
happy motoring.
Road Captain
Joined: Apr 2010
Posts: 686
Likes: 349
From: Central Utah
Average 6 years out of the X-Rated battery (ThrottleX). On my second or third one and Im very pleased with this brands performance. But that was California climate, now its Central Utah. Just put the a last one in October 24. Currently having highs in the upper 20s to mid 30s with lows in the teens so well see how the battery stands up to the killer cold come riding season.
Seasoned HDF Member
Joined: Mar 2021
Posts: 18,157
Likes: 3,644
From: backwoods
Cold bikes are hard to crank, but heat kills the battery. Any thing over 76 degrees starts to degrade lead acid batteries. Which is why I think you see such short battery life down south. Either that or it is to hot to ride, so they don't get charged as much as they do up north.
Seasoned HDF Member
Joined: Jan 2011
Posts: 157,439
Likes: 56,998
From: Michigan 15 Minutes East Of Hell
The battery threads are right up there with oil threads .... Each new rider replying has their procedure that should be followed and if anyone questions their opinion the keyboards start smoking ... Do this, don't do that, can't you read the sign !!
Cold bikes are hard to crank, but heat kills the battery. Any thing over 76 degrees starts to degrade lead acid batteries. Which is why I think you see such short battery life down south. Either that or it is to hot to ride, so they don't get charged as much as they do up north.
Seasoned HDF Member
Joined: Aug 2006
Posts: 24,472
Likes: 30,737
From: Pennsylvania
Some batteries last 20 years.....................................you knew that was coming - right 
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Seasoned HDF Member
Joined: Dec 2005
Posts: 19,868
Likes: 7,987
From: poway
Probably hard to do in florida unless you have more than one bike. Let the bike sit for a week off any tender. If it starts right up, use it.. If it cranks a little slow, replace.
Last edited by Max Headflow; Jan 20, 2025 at 11:57 AM. Reason: a little