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el__burro View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote el__burro Quote  Post ReplyReply Direct Link To This Post Topic: Battery advice
    Posted: 22 Sep 2018 at 22:41
Soon i will be putting my hands on my second V7 850 GT.
I know I need a battery, wich is the best one?

Thanks
el__burro
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Gianni View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Gianni Quote  Post ReplyReply Direct Link To This Post Posted: 22 Sep 2018 at 23:26
The Odyssey PC625 has been most impressive for me. Lasted many reliable years and will happily turn over an LMV and a tuned 992 high compression engine without complaint. Smaller than standard and can be mounted at various angles.
 
Yes they are expensive but, for example, I left a smaller one connected up in one of my Quotas at the back of the garage and forgot about it for three years. When I pulled it and stuck it in my LM1 it fired it up immediately...
 
I was looking at the lithium jobs at the Ally Pally show today - even more expensive but amazingly light, though I appreciate that is not the key performance criterion on an 850GT.
Le Mans 1, Spada, Cali 1, T3 Mongrel, Le Mans V, Quota x 2, Stelvio TT
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el__burro View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote el__burro Quote  Post ReplyReply Direct Link To This Post Posted: 22 Sep 2018 at 23:39
Thanks, i have an Odyssey (pc680) on my bmw r80.. its great..
Odyssey all the way.
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Brian UK View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Brian UK Quote  Post ReplyReply Direct Link To This Post Posted: 23 Sep 2018 at 08:06
The biggest capacity battery you can fit in.

AGM batteries do require special charging, especially if they get discharged. It may be the electrics on the older models are not really up to this.

Many have had just as good service from a lawnmower battery at 1/3 the price.

I would certainly not advocate the lithium models for the same reason. Plus they are twice the price again, for little benefit. Supposed to have twice the life span according to the advertising, but to date none have acheived this.

All batteries lose capacity with age and use, Odyssey included. I had one on an earlier bike, It lasted no longer than any other.
Brian.

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Post Options Post Options   Thanks (0) Thanks(0)   Quote ranton_rambler Quote  Post ReplyReply Direct Link To This Post Posted: 23 Sep 2018 at 08:25
Just fitted a replacement LP896 lawnmower battery to my 850GT. £43 delivered from Eurobatt, but they can also be bought from farm merchants such as Wynnstay, and some Halfords shops.
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el__burro View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote el__burro Quote  Post ReplyReply Direct Link To This Post Posted: 23 Sep 2018 at 08:34
LP896 £43?!
Anyone has that?
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Brian UK Quote  Post ReplyReply Direct Link To This Post Posted: 23 Sep 2018 at 08:55

Tayna are an excellent company to deal with. I've ordered in the afternoon and the battery was delivered the following morning.
Brian.

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Post Options Post Options   Thanks (0) Thanks(0)   Quote Gianni Quote  Post ReplyReply Direct Link To This Post Posted: 23 Sep 2018 at 11:19
This is the company that was at the Ally Pally show
 
Le Mans 1, Spada, Cali 1, T3 Mongrel, Le Mans V, Quota x 2, Stelvio TT
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Amboman Quote  Post ReplyReply Direct Link To This Post Posted: 23 Sep 2018 at 15:30
If you're going to use a lawnmower battery, please choose one that is sealed rather than has cap that vent. Acid fumes don't "play well" with bare alloy, painted or plated surfaces.

My two favorites, depending on what type of connection you prefer are:
- ETX30L (sold also as the YTX30L and MTX30L depending on brand or seller), made for 1450 cc Harleys.
- Mazda Miata (early), the original battery frame fits on it if you trim off two plastic tabs. Has post type terminals like the original 22F battery, only larger.

My '69 Ambassador has an AC Delco 55-6R car battery - sealed, maintenance-free type, 550 ca. Cost me a whopping $55 when I bought it 13 years ago. Still cranks the old Ambo "vigorously". Unfortunately AC Delco no longer offers this battery, only the type which has vented caps.
Charlie
'69 Ambassador,'71 Ambassador,'73 Eldorado,'75 Eldorado police,'76 Convert,'77 Morini 3 1/2 Strada,'81 Ducati 500SL Pantah

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Post Options Post Options   Thanks (0) Thanks(0)   Quote TooJuicy Quote  Post ReplyReply Direct Link To This Post Posted: 23 Sep 2018 at 20:18
Originally posted by Brian UK Brian UK wrote:

Many have had just as good service from a lawnmower battery at 1/3 the price.

If you choose a lawn mower battery check it produces sufficient current to start your engine.  Lawn mower batteries are designed for deep drain not for high power output, so lawn mower batteries have sturdy thick plates, an engine starting battery is designed for high power output and has thin plates for a greater surface area. Consequently a lawn mower battery with the same (ah) capacity as an engine-starting battery can produce perhaps one-third less (cca) current used to turn over an engine. That said, if the lawnmower battery can do the job then it can do the job. Although this also means you might use/consider a smaller, cheaper & lighter motorcycle engine-starter battery as a like-for-like choice.

Tony
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Brian UK Quote  Post ReplyReply Direct Link To This Post Posted: 23 Sep 2018 at 20:20
I doubt the lighter motorcycle battery would last as long.
Brian.

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Post Options Post Options   Thanks (0) Thanks(0)   Quote ranton_rambler Quote  Post ReplyReply Direct Link To This Post Posted: 24 Sep 2018 at 12:45
The type I use is a starting battery for lawnmowers with a petrol engine, not for a rechargeable electric mower. From memory, about 30Ah capacity and 300CCA. The mower we used to have down at the allotment shed was a 700cc Honda V-twin.
Anyway, it started my 850GT this morning. The thermometer outside the back door said 5degC - chilly on the fingers after 40 minutes ride to work.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote jefrs Quote  Post ReplyReply Direct Link To This Post Posted: 24 Sep 2018 at 13:34
To start an engine one needs a 'starter battery'. The important number is the CCA or Cold Cranking Amps. The thing not to use is a deep-cycle, not the electric mower or mobility scooter then.
The starter motor on my V7II says 1.5kW. That means it draws 125amps, not including the surge which could double that. If the battery cannot supply those amps, the volts drop and the starter goes slow.
Rule of thumb for CCA is ten times the charge capacity i.e. 20Ah is about 200CCA. It's not a strict rule however and a wet cell will usually go higher, to fifteen or twenty times the Ah, so a 12Ah wet acid might have a CCA of 240A, and be able to crank for longer (not usually needed).  The traditional wet cell (incl. SLA) also recovers more quickly, something the less efficient AGM is not good at.
Wet cell, whether open or sealed SLA have to vent or they risk exploding or splitting, they must be uncapped. There is usually a tube leading away from the vent.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote jefrs Quote  Post ReplyReply Direct Link To This Post Posted: 24 Sep 2018 at 13:48
To date no lithium battery has passed the SAE CCA test. The Ah of these batteries is often only 1/3 of the equivalent lead-acid they are replacing; the alternator supplies the power when running.
There has been a lot of development of these for electric vehicles and e-bikes. So they are more like a deep-cycle battery than a starter battery; they can deliver a good steady current for a long time. But a starter battery does not have to do that; it has to delivery a huge current instantly. Lithium batteries still do not like doing that, they tend to get, quite warm.
Lithium batteries will get there as starters but they are not there yet, and you still have to sell a kidney for one.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote c13pep Quote  Post ReplyReply Direct Link To This Post Posted: 24 Sep 2018 at 16:36
Crikey having to sell a kidney just to start your bike, what`s the world coming to

Come back kick starters all is forgiven

CHRIS
you can`t have any fun in a straight line

Monza
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