I have been waiting for approximately five thousand years for my MC-3000. I keep forgetting that I ordered it, it's been so long. Ah well. It'll be a nice surprise when it finally gets here.
Battery Charger-MC-3000
- Thread starter Steve W Pedersen
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I ordered it from Gearbest during a sale. They ran out of stock and are apparently having trouble getting more.
I live in hope.
I live in hope.
you might check amazon to see how much you are saving.
i think i paid $92.
i think i paid $92.
I can get it for $105 from Amazon, which is just $1.31 than the Gearbest price. Maybe I'll cancel and reorder.
i'm really sorry you missed that sale.
still. this thing is worth it.
the outside is very well done n mooch said the insides are too.
i haven't seen any charger even close to this one.
still. this thing is worth it.
the outside is very well done n mooch said the insides are too.
i haven't seen any charger even close to this one.
There's a bit more to it than just the final charge voltage. I kind of cringe when people talk about getting two of the same batteries and keeping them "married" forever thinking that's some kind of magic. It makes sense to get the same batteries since if their good cells they should C>D fairly evenly. But that's just a guess if you can't measure it. And batteries age at different rates also, so what might start out a good pairing could wind up quite a bit differently.
At least with a charger that can measure IR you can use that with battery charge voltage to get a better picture of if those batteries were made for each other, and when it's time for them to get a divorce. You can also do discharge tests on both batteries, but that's too time consuming for me to do on a regular basis.
There's also things like if the two battery holders on the mod have the same resistance, etc. But generally if I have two of the same cells, watch final voltage and IR I have pretty good confidence they will work OK for my purposes.
checking IR is quick n easy, so no problem.
i'll never bother with cheap chargers that don't allow this again.
i'll never bother with cheap chargers that don't allow this again.
That's true. Although not a married pair per se, the two cells in the following graph were used identically, each on alternate days in the same mod for two full years:
There is obviously quite a difference in the discharge curves between the red and the green cells. The upper lines, purple and blue, are two more of the same cells, purchased at the same time, from the same vendor, with the same manufacturing date code, the difference being that they were in storage, un-used.
I'm not sure how good an indication that is. AC IR on those four cells, measured with a Vapcell YR1030 before and after the discharge tests were done:
Green: 25.7
Red: 23.5
Purple 14.08
Blue: 13.97
So while there is a whopping difference between the used and un-used cells, I don't think the difference between the two used ones is indicative of the difference in discharge curves between those two.
That wasn't a commonly available feature when I bought my chargers, so I bought a separate meter instead.
I think a separate meter also gives more repeatable readings.
I bought the IR meter on a whim when Mooch mentioned it in a post, so I had it long before I had the CBA or any other repeatable/reliable way of measuring capacity. I was also curious how the two correlate, especially as cells age, either via time or use.
But it is nice to be able to check both in a repeatable manner. If you have accurate IR and capacity readings, you can be confident that a cell is genuine.
to me. checking capacity seems hard on batteries.
i'm saving that for checking new batteries.
is there any other test that works?
mooch said the 3000's tests are accurate.
unfortunately, i can't post graphs like you do.
i'm saving that for checking new batteries.
is there any other test that works?
mooch said the 3000's tests are accurate.
unfortunately, i can't post graphs like you do.
I suppose if you're only planning on charging your cells to 4.05 or 4.10V, then a full capacity test is relatively hard on them. I only discharge to 2.8V rather than 2.5V to check capacity so as not to beat them too hard.
Well, for married pairs (which was what this thought was originally about), I would just compare voltage when you pull them out of the mod to re-charge them. If they are close in voltage, they don't need a divorce. The difference shown in the graph I posted should be evident on a static comparison of partly discharged cells.
hiya, mord.
i haven't figured out how to connect this to a comp.
not even to get updates.
i understand little about the world.
i guess i'll go hide under the bed now.
i haven't figured out how to connect this to a comp.
not even to get updates.
i understand little about the world.
i guess i'll go hide under the bed now.
k, i get that ross,
zaz, where will you buy?
better shop around, to maybe catch a sale.
zaz, where will you buy?
better shop around, to maybe catch a sale.
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