High-Tech Battery Solutions seem like a Good place to buy your battery's from $89.95+tax $103.49 for a Deka ETX30L.I ordered late on Friday and got it Tuesday morning. I didn't realize how weak my 4+ year old original battery was until I cranked my 2011 Electra Glide over with this new battery It sure gives that 103 a good spin on start up now.

 

Allowing a battery to get old and weak is not good for your bike (or car's) electrical system.
I change my car/truck batteries every 5 seasons, and my "road bike" batteries every three season, or even earlier if they show signs of not cranking the engine well.


I also use battery tenders on all of my batteries except the vehicles that are driven daily.