Which new battery for my Honda CRF?
I have been arround electric flight for some years now - since the first Ikarus ECO Piccolo helicopter, which had a fantastic 90seg autonomy with NiMH!
Even though I fly electric for a few years, I don't now much about the theme - I'm only an user.
I would like your help to solve a non-RC problem. I have a Honda CRF 450X motorcycle, which has a 6A 12V lead battery that I want to replace (Yuasa YTZ7S).
The original battery specs:
Dimensions: 4.4375" x 2.75" x 4.125"
Weight: 4.6 lbs.
Metric Dimensions: 113mm x 70mm x 105mm
Metric Weight: 2.1 kg
Acid Volume: N/A
The battery should be light, resistent to shock, powerful, not ignite in contact with water and capable of being charged by the original system.
I was thinking about o use 6 packs of these:
1- Do you think it can be charged without problem with the original system?
2- Do you have a better alternative?
Thanks for your help,
or you might want to use a lithium battery, but they are big bucks
This battery needs to cope with the hard conditions of enduro riding: dust, moisture, vibrations and big impacts (not to the battery itself but to the motorcycle)
Then buy the stock one?
With the NiMH battery I would have 0,9Kg (vs 2,1Kg) and 6,9Ah (vs 6Ah)
With the Nih battery, you will have 0.9 Kg, a Honda Lead acid battery type charger circuit that will burn up the Nih battery (and maybe even the charger in your Honda) and a battery that will run your lights, but may not turn over the engine!
Those A123 cells, and some of those LiPo battery packs could easily do the job. Problem is, these cells absolutely have to have individual cell balancing circuitry, or they will have a short life. That would call for four series, four parallel connections of A123 cells for about 8 Amp hours. And a cost of $200, not counting the required balancing circuitry.
It would be too easy to be true :p>
So, no NiMH, no A123 (cost issue) and I have been left with only 2 options:
- OEM lead battery :mad:
- Lipo battery ????
Because of all the stories I have been told, and some incidents I have seen at my club, I am very afraid of using Lipos in my motorcycle. But there's some battery brands which state that they are safe, like WPS:
Lithium Ion Polymer technology
All components are designed, manufactured, assembled and packed in one location assuring high quality and consistency
Extremely lightweight, 50% to 70% lighter than standard batteries
Built-in LED test gauge
Increased cranking amps over lead acid batteries
Fast recharge, can be brought up to 90% charge in within 6 minutes
Easily 6 to 12 times more cycle life compared to lead acid batteries
Long shelf life, up to 1 year before requiring recharging
Can be mounted in any position
No hazardous acid or heavy metals, non-explosive and noncombustible
No shipping restrictions!
More precise fitments compared to other brands of lithium batteries
1 Year warranty
Dimensions 6in. x 7/16in. x 3 11/16in.
What do you think about their claims? Would you put it under you in a motorcycle?
Myself, i would not use a lipo battery in my Bike, i would use a gel cell, they dont loose water :ws: so you dont have to keep filling them up :ws: and they are tough.
On a bike, i wouldn't bother with either. I've had lead acid batteries last for 8 years, abd walmart cheepies have a 3 year warranty. if the lithium is so much better, then why only a one year warranty?
I wouldn't be worried about the capacity or chemistry of the battery, but i doubt you would get anymore life out of it, and it certantly wouldn't be cost effective. i seriously doubt its worth the cost, or hassle.
and this is coming from a guy that converted his automatic car to a manual for a job.
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