Other anti gravity batteries

[masterblaster]

the icharger is pretty cool,seeing what the battery is taking for each tank of fuel used is informative.I have a 20 cell that works great,but the top plastic cracked all around the terminal the second time I unscrewed the fitting,for a battery this fnn expensive they should have high end thermoplastic casing

 

[zzylstra]

My first AG was bought new, it took a crap after two months. Could be my fault could be something faulty. I called AG and bought one and decided I'd send mine in and if its under warranty credit my card. I received the new battery at a little under 14v, installed it (after checking for parasitic drains/ over charging), after two half day rides the battery was sitting at 14.14v. Now u wouldn't think after two rides anyone would check the battery since it is brand new, well glad I did. And will continue to after the head honcho at AG told me PWC charging systems hammer these batteries and was unsure why.

 

[Tyrant1919]

Been using my one antigravity for 8 months now, 100~ hours. I have never charged it from a wall charger. Only charges from the Ski. Highest charge it gets while riding is 14.6 volts. When it's sitting idle it'll go down to 13.4-13.3 and stay that way for days. Left my ski at the clinic for two weeks with the volt meter on it, stayed at 13.3 the whole time.

 

[piratelife]

I had the same "over charging" issue with my first battery. AG sent me out another for warranty. This one seems to be working good so far.

 

[Philip Clemmons]

These batteries have a flat discharge curve. They sit at 13.2-13.5 almost regardless of state of charge. The charger will shut off at 14.4, and almost immediately the battery drops to 13.xx. This is normal and a characteristic of a LiFe chemistry. The other thing worth noting is it could be 13.5 and 90% charged, or 13.5 and 25% charged. Checking voltage as an indicator of charge is useless on these. They hold voltage until they are dead and then "fall off a cliff", or drop suddenly, just like your cordless drill that goes from hero to zero in 2 sec with no warning. Only way to be sure us to charge with a proper charger, and measure mah going in to determine what level if charge the battery was at. It's kinda backwards but works great once you figure it out, is I'd absolutely necessary to avoid over discharging them.

 

[swapmeet]

 

[Superjetjim]

I was about to order a 16 cell, did my research and found this thread, I got stung with 3x Ballistics last time round, these don't appear to be rugged enough for me either. That warranty status change just points at one thing IMHO..

I don't get much chance to ride anymore (family/kids) and just want my ski to work when I tap the little green button.

 

[deftons56]

I was about to order a 16 cell, did my research and found this thread, I got stung with 3x Ballistics last time round, these don't appear to be rugged enough for me either. That warranty status change just points at one thing IMHO..

I don't get much chance to ride anymore (family/kids) and just want my ski to work when I tap the little green button.

I agree, that warranty change shows the real expected life of their product...

Sent from my SPH-D710 using Tapatalk 2

 

[swapmeet]

I talked with a guy from AG today. I sent my battery in... I dunno, 3-5 weeks ago? When I gave him my name, he instantly knew what I sent etc. (I was thinking " thats great dude, why haven't I heard from you?")

Anyway.... he said this season, they're seeing a rash of returns on 12 cells in water craft/ us....

We talked about it for awhile, how our skis are ridden etc. He admitted that he thought it was the charging systems doing jankey stuff, but he's since ruled that out. They even did a investigation into the mfg of batteries, to see if they had a bad batch. But the same 12 cells used in other vehicles are working fine.

The theory (the new one anyhow) is that those of us who are aspiring freestyle champions are probably killing and restarting our skis more often than any other application. (Imagine failed BF attempts repeated over and over) Basically a lithium battery won't be able to handle that much abuse. Especially a 12 cell. Add in a little water ingestion making it hard to start and it beats on the battery even more.
The guys racing skis aren't returning their batteries at all (according to him), just the free style/ surf guys. So whats different? There's your problem....
And the "Pro's" aren't having any issues because they actually land their tricks...

Also, he said that they can analyze a returned battery and tell if its died because of use with total loss. That being said, he is willing to work with anyone who is unhappy, as long as you don't try to lie your way into a free battery. Which i kinda get.

He mentioned that they may revise their application chart for more cells vs. CC's than they currently recommend. (I.E. 16 Cell for a 770-900 instead of a 900)

Worthy note, a mfg who is a member on the X is working with AG to develop a LED battery indicator to let you know if you're about to kill it.


I was kinda out on AG. After talking to their dude.... i'm gonna give them a chance. He's working with me, so I'll work with them. I'm all about second chances


That is all....

 

[River Rat]

Good to know !

 

[raytherace]

Same here, we find out that maybe some of the 4amp charger was defect. I called AG and spoke with Eric multiple time and he was very comprehensive. He agreed to change all my charger and 12 cell to tecmate lithium charger and 16cell. Its the way to go, 2 thumbs up for AG service.

 

[Philip Clemmons]

Worthy note, a mfg who is a member on the X is working with AG to develop a LED battery indicator to let you know if you're about to kill it.

.

I'd love an explanation on this one. These batteries hold voltage at 13.2-13.4 until they plummet (to a non usable range). Im not sure how any voltage reading can indicate SOC on these. On our aircraft, we charge before use, b/c it's the only way to know what's in the battery. It can be 90% charged 13.4, and 20% at 13.2....

Great idea, but interested in the outcome.

 

[Matt_E]

I'd love an explanation on this one. These batteries hold voltage at 13.2-13.4 until they plummet (to a non usable range). Im not sure how any voltage reading can indicate SOC on these. On our aircraft, we charge before use, b/c it's the only way to know what's in the battery. It can be 90% charged 13.4, and 20% at 13.2....

Great idea, but interested in the outcome.

x2, I don't see how that's realistic. You charge it 100%, then time the use so you know when to land. (Or hear the dreaded prop surge, lol!)

 

[truerider411]

crapped out a second one in a month. this week wtf. all precautions are taken and i know how to use lithium batteries

 

[swapmeet]

I'd love an explanation on this one. These batteries hold voltage at 13.2-13.4 until they plummet (to a non usable range). Im not sure how any voltage reading can indicate SOC on these. On our aircraft, we charge before use, b/c it's the only way to know what's in the battery. It can be 90% charged 13.4, and 20% at 13.2....

Great idea, but interested in the outcome.

I just work here.

He threw out some voltages that do not correlate with the numbers you mention, which lead me to believe there was enough variation to recognize an impending failure.

Clearly you know a lot about this technology, so dont shoot the guy who just works here.

 

[Philip Clemmons]

I just work here.

He threw out some voltages that do not correlate with the numbers you mention, which lead me to believe there was enough variation to recognize an impending failure.

Clearly you know a lot about this technology, so dont shoot the guy who just works here.

No worries man. Just curious. It's all good.

 

[Fro Diesel]

crapped out a second one in a month. this week wtf. all precautions are taken and i know how to use lithium batteries

Try Wps lipo batteries. Haven't heard of a single issue yet.

 

[Matt_E]

Try Wps lipo batteries. Haven't heard of a single issue yet.

Give it six months.
Every single new LiFePO battery that's come out in the past few years was heralded as some revolution that was just the best for watercraft.

 

[Fro Diesel]

At the rate people go through the AG batteries the WPS would be the lesser of the evils. I haven't heard of anyone with an AG that didn't have a problem, and then have issues with getting it replaced. I will be sure to update you in December. And I understand your skepticism. But after six months it would be worth three AG batteries.

Edit: It should be noted that wps lithium batteries utilize a slightly different technology more resistant to vibration and overheating.

 

[SuperDrifter]

From the too late to return department....

Are the 16cells less likely to carp out?