Battery Chargers?

Discussion in 'The Garage' started by garandman, Nov 29, 2012.

  1. garandman

    garandman Wandering Minstrel

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    Anyone up on battery chargers? I have an old charger that doesn't seem to work with the AGM battery in the Triumph. The Battery Tender Jr. does seem to work OK with it so I'm fine, but I want to get a new one.

    I'm looking at the Clore 4520, a 20/12/2 Amp charger that should work well with cars and bikes.
    [​IMG]

    PS We already have several Deltran Battery Tenders or BT Jr, I want something that can quickly charge an automotive or motorcycle battery.
    #1
  2. 568V8

    568V8 Ontario Vstrommer

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    Deltran Battery Tender Junior. About $35 and perfect for motorcycle batteries.
    DON'T use a charger that is for car batteries, or you cook your bike battery. Because they are designed to be charged with only a trickle charger with a low output like your stator.
    #2
  3. SnowMule

    SnowMule [angry moth noises]

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    +1 for batt tender jr. Great for moto batteries.

    The bigger ones are for bigger batteries.
    #3
  4. Range Motorsport

    Range Motorsport Junk collector

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    On this note many bigger ones have a low amp charge rate like mine which can do 2, 20, or 50 amps. Most powersports size batteries will only handle 10 amps.

    Get what best serves your needs.
    #4
  5. VStromTom

    VStromTom Long timer

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    One of my BT's died so I bought a WallyWorld charger that works great. It's bigger than the BT but only marginally so. Under $20 too. Works the same as BT and I have my bikes set up so I can use either charger on any bike.
    #5
  6. GoNOW

    GoNOW Long timer

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    I like the http://www.geniuschargers.com/ chargers. They have an AGM setting for the higher voltages the AGMs need.
    The 3.5 amp one is my favorite for general use.
    #6
  7. garandman

    garandman Wandering Minstrel

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    That's why I'm looking at this Clore - it's got "intelligent" charge rates depending on the battery size and type.

    My current charger is a 6Amp max so I could use it for motorcycles. But it's around 25 years old so it doesn't charge AGM batteries properly.

    Know anything about the company? Clore makes some great products, I have their jump starter and it's night-and-day better than most of the other products around.
    #7
  8. HapHazard

    HapHazard Waiting for Gudenov

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    I have quite a collection of battery chargers, mostly "old school" transformer jobs, in various capacities (1.5 amp, 3 amp, 2 &10 amp, 6 amp, 2, 10 & 50 amp) and some maintainers (Battery Tender Plus, HF cheapies). For a "straight charge", I just use an appliance timer and watch the meters, after the charge rate has dropped down for a while, I turn off the charger (the timer is there for when I forget to check on it). Then check the voltage after the battery "rests" for a few minutes and you're done - AGM or flooded, I've never had a problem.

    Maintainers, the BT Plus is great, and much preferred to the HFs (which I use on the car and tractor batteries, not AGMs except on my ATV, which works). I would also like to get a maintainer that claims to "de-sulphate" batteries, and am shopping for one (or three).

    I had never heard of Clore, so I Googled it and found that charger at Amazon:

    http://www.amazon.com/Clore-4520-12V-Smart-Charger/dp/B004RTJONY

    There are 2 reviews, one is 5 star (that reads like it was copied from the claims on the box), and one is 1 star ( that someone had one arrived DOA and two of them die premature deaths).

    I tend to rely on the simple reliable stuff for the simple jobs (one of the chargers I have is 50 years old, and still works fine). Many of the new digital controlled chargers seem to lead short, unhappy lives.
    #8
  9. ragtoplvr

    ragtoplvr Long timer

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    That is incorrect

    My BMW has a 55 amp alternator. Harleys have a 45 amp alternator. I have had a current probe on both. Right after starting the battery will accept 30+ amps, very common. This happens every start for 30 to 60 seconds, then it tapers off. I have intentionally discharged Harley batteries to where the bike needed jump started and then ran them at 2500 RPM in front of a fan until the battery was charged testing regulators and stators. I have had a good Yuasa AGM that took over 50 cycles before it died. I can not kill an Odyssey in the same test. This same situation will be true of any modern bike with a decent alternator. It is also true for cars like a Miata with a very small AGM battery. Strangely enough, we do not have a lot of quality batteries fail. MY starter endurance test rig has a Harley alternator mounted on 3 phase motor, recharging the battery after each start. I have had 1000 cycles on a battery and starter. I know several Beemer riders with 5+ year old Odyssey. I am an Odyssey convert now.

    If you have a quality charger or alternator with effective electronic voltage regulation, it will not hurt the battery. If you have a cheap one, they usually over voltage the battery, and that is always bad even if it is a 1.5 amp trickle charger left on too long..

    My home charger is a cheap one but I removed the diodes and regulator and replaced with a Harley Rectifier regulator., Seems to work great.

    Rod
    #9
  10. bob393

    bob393 Been here awhile

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    +2 Have 4 of them, even one on the tractor, and one on the truck but it's the larger one.
    #10