Just traded my 05 with original battery. Tested like new just a few months ago. Never had a tender on it at all. Garage kept in NC with 20K+ miles

 

Let's see...
First one: HD battery - 1999-2003
Second one: HD battery - 2003-2010
This one: Batteries Plus - 2010 - ????

 

Had it six years with a tender.

 

Replaced mine on my 03 FLHTCi as PM. It was still working well, but i have learnt the hard way. To-days batteries are not like yesterdays batteries that gave you some warning when they were going. To-days batteries will start you without any issues in the morning then come time to go home from work are shot.

 

Have made as much as 10 yrs always on a Tender.

 

I called the technical support at EAST PENN manufacturing. The EXT30L is the SAME battery as the OEM Harley. This guy actually worked on the assembly line.

The AGM (Absorbed Glass Mat) is the same the cells and lead is the same. Only difference is the case is a different color. EAST PENN makes Deka, Extreme Power, NAPA, Batteries Plus,Fleet Farm, O'Reily Auto parts ..don't believe me....call for yourself.

No special HD Specifications or other "vibration" spec's...it's the same battery...as HD.

1-610-682-6361 or http://www.eastpenn-deka.com/

Bill

 

My '04 battery was still good at the 4 year point but I changed it before a long trip just to be safe. My '07 battery went out at the 4 year point. The '04 was a TC88 Wide Glide so maybe wasn't strained as much as my '07 Ultra battery, who knows...

I replaced both with HD batteries. 4 years is good for a battery, in my opinion. I don't use a tender because I ride every day, unless it's raining, which it hasn't done here in San Antonio in weeks.

 

Original lasted 5 years. Gave me no warning. Just left me stranded.

 

6 years 3 months.
Never been tendered, but highway ride year round which keeps it good and charged.

 

According to their website the EXT30L "Does not meet Harley-Davidson OEM specifications"