Bump tag setup, what is charge max c - HeliFreak
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Old 12-18-2016, 02:08 AM   #1 (permalink)
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Default Bump tag setup, what is charge max c

Like the title says, what should I put in for this as I not really sure?

A friend of mine told me on my 65c pack to put in 40c for this setting, as it's more the true c .
No idea if I should have done that, but I did
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Old 12-18-2016, 08:16 AM   #2 (permalink)
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That is the upper limit for charging current. Typically not more that 5C for most packs. 40 is definitely way too high. You would never charge at 40C.
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Old 12-18-2016, 08:20 AM   #3 (permalink)
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Your title says charge max C. This is the max charge rate you want to charge your batteries. Factory recommendations are 3-5 or so. I choose 2C.

The other C is the c-rating of your batteries output. Can't really say for sure, but don't think it really matters what you put in the bump tag info or charger. It is just a data point I believe, but I would put in what the label on the battery says.
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Old 12-18-2016, 09:46 AM   #4 (permalink)
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Put in what the label says as the max recommended charge rate. Ie: Pulse and GensAce are 5c max.
The setting just prevents you from exceeding the recommended max rate when setting up a charge. It doesn't mean you can't charge slower. My 'normal ' charge rate that I usually use is 2c. My max limit is 5c for most of my packs but I have never used that fast of a charge.
Also, this setting can't be changed once written to the BUMP tag. If you set this to 2c, the BUMP will prevent you from charging any faster.

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Old 12-18-2016, 09:46 AM   #5 (permalink)
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Quote:
Originally Posted by jrman83 View Post
Your title says charge max C. This is the max charge rate you want to charge your batteries. Factory recommendations are 3-5 or so. I choose 2C.

The other C is the c-rating of your batteries output. Can't really say for sure, but don't think it really matters what you put in the bump tag info or charger. It is just a data point I believe, but I would put in what the label on the battery says.
The max charge C is the max rate the manufacturer recommends charging the pack. Most packs say it on the back label. If u cant find it, use 1/10th the pack C rating (the max discharge rating). This is also the default value the Bump generates for you.
Note that this value sets the upper limit, so dont set it artificially low - your settings values adjust how u prefer to charge it.
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Old 12-18-2016, 11:24 AM   #6 (permalink)
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Totally my fault but I worded this incorrect but I meant the pack max, like the pic shows.
My buddy says if a pack says 65c but not to put in that as the pack max, as that's not the true pack max C As these are always false
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Old 12-19-2016, 09:02 AM   #7 (permalink)
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Quote:
Originally Posted by RevoKelly View Post
The max charge C is the max rate the manufacturer recommends charging the pack. Most packs say it on the back label. If u cant find it, use 1/10th the pack C rating (the max discharge rating). This is also the default value the Bump generates for you.
Note that this value sets the upper limit, so dont set it artificially low - your settings values adjust how u prefer to charge it.
I saw that it uses it as the default charge rate. I will never charge above 2C, regardless of what the pack is rated. Just would not have the need to charge that fast.
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Old 12-20-2016, 09:39 PM   #8 (permalink)
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I charge at 3C nearly all the time.
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Old 12-21-2016, 09:53 AM   #9 (permalink)
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I charge at 3C nearly all the time.
Same here I charge at 3c 100% of the time.....unless I have too many batteries to do at once and I'm restricted by my generator/PS output.
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Old 12-21-2016, 10:05 AM   #10 (permalink)
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Same here I charge at 3c 100% of the time.....unless I have too many batteries to do at once and I'm restricted by my generator/PS output.
The only time I'm not charging at 3C is the first few break-in cycles, if they've been sitting unused for an extended period, or if they are cold (Winter flying).
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Old 12-21-2016, 03:23 PM   #11 (permalink)
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During winter I charge in my heated garage before going flying.....I have a bench by a door....I can chuck them out if I see something wrong.

I do cycle them 3 time at 1c before using them.
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