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Talk to me about Lithium Batteries...

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The Shaggy D.A.
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Joined: 12 Sep 2008
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PostPosted: 20:18 - 30 Oct 2016    Post subject: Talk to me about Lithium Batteries... Reply with quote
The Enf needs a new battery, and I've been trying to find the right size Motobatt. Whilst looking, I've seen this lithium jobby :-

https://www.ebay.co.uk/itm/Lithium-ion-12V-24WH-Motorcycle-Battery-JMT-YTZ5S-FP-SWI-/332007396736

It's a small enough size that I could later move it to one of the toolboxes to clean up the lines. I'm wondering whether there's any special considerations with lithium - would the basic charging capabilities of the bike struggle in any way? Or can you just fit and forget?
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Currently : Royal Enfield 350 Meteor
Previously : CB100N > CB250RS > XJ900F > GT550 > GPZ750R/1000RX > AJS M16 > R100RT > Bullet 500 > CB500 > LS650P > Bullet Electra X & YBR125 > Bullet 350 "Superstar" & YBR125 Custom > Royal Enfield Classic 500 Despatch Limited Edition (28 of 200) & CB Two-Fifty Nighthawk > ER5
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temeluchus
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Joined: 01 Oct 2008
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PostPosted: 20:20 - 30 Oct 2016    Post subject: Reply with quote
Mine was fit and forget.

Has been over a year and not had to give it a second thought. Same JMT make as that.

Inb4 it will set on fire, doom gloom and autism
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dydey90
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Joined: 01 Oct 2013
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PostPosted: 21:36 - 30 Oct 2016    Post subject: Reply with quote
I wouldn't have thought they'd be as good in the long term. Lithium ion batteries are designed to do complete drain complete recharge cycles and don't like partial recharges. You'll notice it with a phone or a laptop that's a few years old.
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Past: CBR125,ER6f NINJA 650, ZZR600 Current: VFR750
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RhynoCZ
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Joined: 09 Mar 2012
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PostPosted: 21:58 - 30 Oct 2016    Post subject: Reply with quote
dydey90 wrote:
I wouldn't have thought they'd be as good in the long term. Lithium ion batteries are designed to do complete drain complete recharge cycles and don't like partial recharges. You'll notice it with a phone or a laptop that's a few years old.


Few years being from the 80's and early 90's. Those were Nickel-Cadmium (later on some sort of Nickel based improved design), not Lithium.

Yes, those Nickel based batteries had ''power memory''. Meaning, if you had 60% charge and you charged it up to 100%, it could only remember the last 40% charge and not the rest of the battery's capacity.

On a different note, all the EVs today run Lithium based batteries. Wink

EDIT: What you do not want to do with a Lithium based battery, is to drain it bellow the critical point. The Li-ion batteries are quite clever though and contain (or should) a device preventing that. By the way, draining a standard motorcycle/car battery bellow 11v is going to kill it. Thumbs Up
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ThatDippyTwat
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Joined: 07 Aug 2016
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PostPosted: 22:17 - 30 Oct 2016    Post subject: Reply with quote
dydey90 wrote:
I wouldn't have thought they'd be as good in the long term. Lithium ion batteries are designed to do complete drain complete recharge cycles and don't like partial recharges. You'll notice it with a phone or a laptop that's a few years old.


Nope.

Ni-Cd have a severe memory effect. MiMh were much better, but neither of those are anywhere near suitable for this application. A high discharge battery for a bike will almost certainly be a 3S LiPo based battery (outside possibility of Li-Co-Mn). This is a chemistry that gives pretty much zero fucks about partial charges. It's more likely to develop "hairs" that will lead to it's eventual retirement on the anode from incorrect charging and over-discharging. The latter 2 should largely be prevented by an on-board BCM.
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Kickstart
The Oracle



Joined: 04 Feb 2002
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PostPosted: 22:36 - 30 Oct 2016    Post subject: Reply with quote
Hi

This old post might interest you. Or scare you about the cheap rubbish sometimes sold!

https://www.bikechatforums.com/viewtopic.php?p=4060912#4060912

All the best

Katy
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Old Thread Alert!

The last post was made 8 years, 236 days ago. Instead of replying here, would creating a new thread be more useful?
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