For consideration, do not know how much of a fire hazard they can be; however, AGM batteries are not fire prone:

https://www.hdforums.com/forum/evo/1...ife-sucks.html

 

Did you have to do any warm-up procedures prior to cranking over the starter? I have heard for extreme cold turning the headlights on for a few seconds before hitting the starter motor helps ensure a strong cranking. Curious if you’ve found it true, and to what degree.

 

Oh man, that's horrible. 🥲

 

Thanks, you just made my mind up. AGM for me.

 

It's too soon to ask him, but since he states it was on charger it makes me wonder if it was a proper charger for lithium? If so, I don't think I want that risk.

 

Also it my have been one of those scooter batteries that have started fires elsewhere when plugged in and over charged. EV have had some of those issues also but do not know how widespread they are.

 

My understanding is that the lithium iron phosphate batteries that you'd buy for your bike aren't as dangerous as a lithium ion battery that most people have heard of. They're different types of batteries, but some of the critics I've talked to don't seem to know this. I think the most important thing is to stay with a name brand that has a (battery management system) BMS. I don't like the complexity of a good lithium battery but I've almost decided to buy one for my Dyna when spring time rolls around. The AGM battery is a couple of years old, getting weak and starting to act stupid on hot starts. I want to try the lithium battery because it's cheaper than a high output starter or installing compression releases.

My theory that may be BS: The lithium should maintain higher voltage under load and spin the starter faster. Since the battery voltage will be higher during cranking, the starter could draw more current but for a shorter time. I think the lithium battery will be better for the life of the starter. There's a lot of heat being made when the engine comes up on the compression stroke and almost stalls the starter. It's damn sure bad for it if the engine kicks back every now and then.

 

Yeah awhile back a bunch of those electric scooters caught on fire when being charged. Those batteries had a different chemistry. The lithium motorcycle batteries are lithium iron phosphate (LiFePO4) and are much more stable. I don't think I've heard of one catch on fire.

One thing to note on the lithium batteries in cold temps is to warm the battery first before starting. You could turn the lights on for a few minutes to warm them up.

 

I appreciate the relevant thoughts, thanks. I'm sure others have some of these questions also, I hope this flow continues.

 

I tried a lithium battery from Anti Gravity with the restart feature. This was going in my 2008 Street Glide with a 124". I kept the bike on their specified tender when the bike was sitting for awhile. I got 14 months out it. Went to ride the bike, hardly anything lit up when the key was on. I checked the voltage through the charging port with a volt meter, 2 volts! I pulled the seat and pressed the restart button that's supposed to give you back your voltage and amps to start the bike. It was at 10 volts after pressing the restart. I grabbed my other bike and went riding with the six your old Yuasa starting it.

Next day I spoke to Anti Gravity, and pretty much got the tough toenails speech as the warranty was out at 12 months. I could buy a new one at a discounted price they said. No thanks. I had tried to charge it with their charger, it wouldn't go over 10 volts.

I went back to Yuasa AGM. 500 cold cranking amps, made in Pennsylvania, and they work really great. Anti Gravity batteries are made in China.
Spins the 124 over with ease. They also have finger slots in the front and rear of the battery, makes pulling the battery out and putting it in really easy.

I know that's not everyone experience with a lithium battery. But it was enough for me, I received no advantage to owning one.


YUASA GYZ32HL 500 AMP AGM