Today's Message Index:
----------------------
1. 06:12 AM - Re: Re: Battery Tender (Robert L. Nuckolls, III)
2. 11:01 AM - Re: Re: FYI: New kid in battery charger/maintainers (skywagon185guy)
3. 02:14 PM - Re: Re: FYI: New kid in battery charger/maintainers (Matthew S. Whiting)
4. 06:32 PM - Re: Re: FYI: New kid in battery charger/maintainers (Jared Yates)
5. 07:31 PM - Re: Re: FYI: New kid in battery charger/maintainers (Matthew S. Whiting)
Message 1
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| Subject: | Re: Battery Tender |
At 08:32 AM 8/18/2023, you wrote:
>
>Bob,
>I had a Deltran Battery Tender Junior on my PC680 for years and it
>worked fine. I sold the plane and am not driving my car as often.
>The Tender Junior max charge is 750 Ma. When I put it on my car that
>was just driven it got too hot to touch in about 30 minutes. Is it
>too small for the higher capacity auto battery?
Hmmmm . . . let me see if I can duplicate your
observation. That seems a bit odd for so small
a charger. It should be current limited to some
value not hazardous to the charger.
(followup) just finished a quick test to see
if I can duplicate your observation. The BT
performed in a civil manner while barely
warming up to touch. I think your BT
is hosed.
Bob . . .
////
(o o)
===========o00o=(_)=o00o========
< Go ahead, make my day . . . >
< show me where I'm wrong. >
================================
In the interest of creative evolution
of the-best-we-know-how-to-do based
on physics and good practice.
Message 2
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| Subject: | Re: FYI: New kid in battery charger/maintainers |
Joe's charger comment is very correct about the potential discharge problem
.
This is true also of the small maintainers like the Battery Tender.
They don't appear to have a blocking diode to prevent battery discharge.
If your wall power fails, due to a GFI failure, power line failure,etc.,
the chargers will slowly discharge the battery,
This can be really bad on some batteries. If discharged totally they may
not be recovered or have severely limited capacity when charged.
On Thu, Aug 17, 2023 at 5:53=AFPM user9253 <fransew@gmail.com> wrote:
>
> I purchased a similar one of those chargers.
> Pros:
> Charges quickly, up to 8 amps.
> _
> Cons:
> The wires are too short, only a couple of feet long.
> The wires are stiff, might be stranded but not very many strands.
> When clamping onto a battery, a spark jumps. That tells me that the
> charger
> is drawing power from the battery before the AC cord is plugged in.
> An internal fan runs while charging.
> I would not trust leaving the charger connected overnight.
>
> --------
> Joe Gores
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=511294#511294
>
>
===========
===========
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>
>
Message 3
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| Subject: | Re: FYI: New kid in battery charger/maintainers |
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Message 4
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| Subject: | Re: FYI: New kid in battery charger/maintainers |
The EarthX BMS would have mitigated the undervoltage failure. Don't let a
bms design shortcoming sour you to Lithium, it wasn't the lithium's fault.
Can't speak to the cranking problem without more details, but it hasn't
been my experience.
On Mon, Aug 21, 2023, 17:18 Matthew S. Whiting <m.whiting@frontier.com>
wrote:
> This generally isn=99t a problem unless you have a really long powe
r outage,
> unplug the maintainer and forget about or have a defective maintainer tha
t
> doesn=99t power back up after a power failure. I experienced the l
atter with
> my first Lithium battery. I bought a Shorai battery and their special
> BMS01 charger that had a special connector to balance the cells. Well,
> their special charger also had special defective firmware. The first
> winter I had the battery, we had a power outage and I thought nothing of
it
> as my BatteryMINDers always powered themselves back up when the power was
> restored and kept on trucking. Well, the Shorai charger, not so much.
> When I went to get the battery in the spring to put in my motorcycle, I
> noticed no lights on the charger even though it was still plugged in. I
> unplugged it and plugged it back in thinking it had died during the winte
r
> and it came right back up, but flashed lights that the batter was
> defective. I checked the voltage and it was well down into single digits
.
> Deader than a door nail.
>
> Shorai admitted they had a firmware issue in the BMS01 and replaced my
> battery under warranty. They said they would have a firmware fix and wou
ld
> exchange my charger, but after several months of inquiring about it and
> getting all sorts of excuses, I gave up on them and sold the charger, aft
er
> informing the new owner of the defect. I will never own another Shorai
> product and got pretty soured on lithium batteries as the Shorai would no
t
> reliably crank my motorcycle at temps below 35. We had to jump it twice
> during a trip to Alaska.
>
> Sent from my iPad
>
> On Aug 21, 2023, at 2:03 PM, skywagon185guy <skywagon185@gmail.com> wrote
:
>
> =EF=BB
> Joe's charger comment is very correct about the potential discharge
> problem.
>
> This is true also of the small maintainers like the Battery Tender.
> They don't appear to have a blocking diode to prevent battery discharge.
> If your wall power fails, due to a GFI failure, power line failure,etc.,
> the chargers will slowly discharge the battery,
> This can be really bad on some batteries. If discharged totally they may
> not be recovered or have severely limited capacity when charged.
>
> On Thu, Aug 17, 2023 at 5:53=AFPM user9253 <fransew@gmail.com> wrot
e:
>
>>
>> I purchased a similar one of those chargers.
>> Pros:
>> Charges quickly, up to 8 amps.
>> _
>> Cons:
>> The wires are too short, only a couple of feet long.
>> The wires are stiff, might be stranded but not very many strands.
>> When clamping onto a battery, a spark jumps. That tells me that the
>> charger
>> is drawing power from the battery before the AC cord is plugged in.
>> An internal fan runs while charging.
>> I would not trust leaving the charger connected overnight.
>>
>> --------
>> Joe Gores
>>
>>
>>
>>
>> Read this topic online here:
>>
>> http://forums.matronics.com/viewtopic.php?p=511294#511294
>>
>>
>>
>>
>>
>>
>> ==========
>> -
>> Electric-List" rel="noreferrer" target="_blank">
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>> ==========
>> FORUMS -
>> eferrer" target="_blank">http://forums.matronics.com
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>> -Matt Dralle, List Admin.
>> ="noreferrer" target="_blank">https://matronics.com/contribution
>> ==========
>>
>>
>>
>>
Message 5
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| Subject: | Re: FYI: New kid in battery charger/maintainers |
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