Page 3 of 3 FirstFirst 123
Results 21 to 25 of 25
  1. #21
    Senior Member
    Join Date
    Feb 2018
    Location
    Plymouth
    My Ride
    2016 Iron 883
    Posts
    202
    Thanked: 80
    Quote Originally Posted by BuckhornBud View Post
    I've been advised that keeping a battery permanently hooked up to an optimate or similar won't actually help prolong battery life...it doesn't harm a battery to be discharged now and again, just not left to fully discharge to a flat state. I leave mine off for 4 weeks at a time with no ill effects but over the winter it gets hooked up and left until charged then disconnected for 3 or 4 weeks before trickle charging to top it up every 3 or 4 weeks. Even optimates (at least the one I have) continue to charge at low amps when the battery is full, and this does neither the battery nor the charger any good. I have another which dumps current once it detects a full battery but it's still using electric all the time so with my green hat on, I think it's poor practice to leave any charger on all the time.
    I agree with your thinking, it's called memory effect.

  2. #22
    Senior Member K9F's Avatar
    Join Date
    Dec 2015
    Location
    South Coast
    My Ride
    FXSE CVO BREAKOUT
    Posts
    2,970
    Thanked: 916
    There is often a misconception that leaving a battery connected for a significant amount of time is detrimental to the life of the battery! It is NOT a CHARGER you need but a BATTERY TENDER. A battery tender simulates daily usage by discharging to differing levels and recharging your battery to full only delivering a subsequent charge when and if it is required before the next scheduled cycle. You can leave a tender fitted for as long as you wish without ill effect. If however you do not have a sealed battery a periodic check of battery electrolyte level even in the case of a tender is strongly recommended.

    Chargers are so yesterday, outdated and unnecessary where there are a myriad of tenders on the market for about half the price of a replacement battery.
    Last edited by K9F; 06-13-2018 at 03:17 PM.

    IF YOU GO THROUGH LIFE WITH YOUR HEAD IN THE SAND.....ALL PEOPLE WILL SEE IS AN ARSE!!
    TREAT EVERY DAY AS YOUR LAST.....ONE DAY YOU WILL BE RIGHT!!

  3. The Following User Says Thank You to K9F For This Useful Post:

    Spurtle (06-13-2018)

  4. #23
    Senior Member
    Join Date
    Apr 2017
    My Ride
    A proper bike
    Posts
    514
    Thanked: 131
    Mine is a tender but I still don't leave it on all the time as I don't see the need, nor in needlessly using electric. My battery's been off the tender for probably a couple of months now. When I have any hint of heavy starting, it goes back on and I let it do its thing for a good 2 to 3 days and it's usually good as new. It's a fallacy I think that batteries need to be constantly hooked up to tenders...they don't unless you have something drawing a lot of current, like some after market alarm systems. During the summer, most bike owners will use a bike at least weekly I'd have thought and a few good runs will keep the battery in good enough shape. It's lots of short runs that'll do the damage to batteries as well as engines.

  5. #24
    Senior Member Whistler's Avatar
    Join Date
    Mar 2016
    My Ride
    2016 Harley-Davidson 883 iron
    Posts
    3,423
    Thanked: 620
    Quote Originally Posted by Johnnythefox View Post
    I agree with your thinking, it's called memory effect.
    I agree too. Never thought it was good to leave any battery on charge all the time, so haven't done it with my Iron. I put the charger on every 3-4 weeks till it shows a full charge . Did same with my honda and had batteries last up to 9yrs.
    FTW )

  6. #25
    Senior Member
    Join Date
    Sep 2017
    Location
    Ireland
    My Ride
    Dyna Superglide
    Posts
    108
    Thanked: 55
    Memory effect is the old NiMH(nickel Metal Hydride) rechargeable. Don't think they ever made these in larger than power tool sizes. Draining a battery is only helpful with the NiMH or some Lithium Ion. I would not put a Li batt in my Harley, tho. It shakes too much and a 400CCA Li batt would burn it to the ground quickly if it failed. I mean too fast for you to park it and jump off of it. Li goes up like a freaking roman candle. Most batts are AGM nowadays. Gelled meshed vs water. No maintenance, no topping off, and the design doesn't lend itself to plate breakage. But it can still sulfate if it is drained too much(80% vs 50 for lead acid). It also charges 5X faster than the old style.

    http://batteryuniversity.com/learn/a..._glass_mat_agm

Bookmarks

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •