Unmarried batts

[smacksy]

I have the Kooper Primus but don't have 3 batts the same amp rating..
Two say 40A and one says 38A..
Can these batts be run together? thx

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[LilWhiteClouder]

I have the Kooper Primus but don't have 3 batts the same amp rating..
Two say 40A and one says 38A..
Can these batts be run together? thx

Sent from my XT1585 using Tapatalk

I've seen it work but fairly positive it is a no no to pair unequal batteries... even if they are close. Wait for the batt experts though... @Baditude or @Mooch could shed light. Also check mooches blog on here for answers.

 

[smacksy]

I've seen it work but fairly positive it is a no no to pair unequal batteries... even if they are close. Wait for the batt experts though... @Baditude or @Mooch could shed light. Also check mooches blog on here for answers.

good advice, thanks!

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[DaveP]

Just like two tanks connected by a hose at the bottom where water flows back and forth to equalize the volume, batteries will reverse drain into each other to equalize voltage. When that happens it's not a good thing.

The other thing that can happen is that the weakest battery will make the other one or two work harder. That creates heat and heat is a battery's enemy.

You are better served by using all new cells and keeping them married in a set by storing them in a plastic battery box so that you don't mix them up between uses.

Buy batteries in matched sets for use in that mod. Good choices would be the Sony VTC6, LG HG2, and Samsung 30Q, and others with high amperage and MAH ratings.

 

[mongo74]

40a? 38a? Which batteries are these out of curiousity.

 

[smacksy]

40a? 38a? Which batteries are these out of curiousity.

AWT

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[LilWhiteClouder]

40a? 38a? Which batteries are these out of curiousity.

38 amp could only be the efest, no? who else would come up with a rando # like that

Efest: "Well that 40A rating might be stretching it. Let's throw on 38A since it's not too much of a difference from actual Amp ratings. They'll never know the difference!!

"

 

[smacksy]

beats me..an oddball batt I had on hand..If the rain stops I'll make a batt run to my local shop..

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[KenD]

Those batteries definitely don't have the amp ratings printed on the wrappers (there are no 18650s rated over 30 amps), and chances are that their actual cdr is much further apart than 2 amps. Ditch those batteries and get authentic high drain Sonys, LGs, or Samsungs, batteries you can trust.

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[Mooch]

I have the Kooper Primus but don't have 3 batts the same amp rating..
Two say 40A and one says 38A..
Can these batts be run together? thx

Sent from my XT1585 using Tapatalk

In parallel, maybe. In series, best not to.
Those current ratings are a lie so ignore them. What most determines how closely two batteries discharge together in series is their capacity. If they are the same there's a chance they might keep their voltages fairly close together.

Best to just buy a new pair. No matter what their cost, batteries are dirt cheap considering you get to use them for hours every day for months or even a couple of years.

 

[smacksy]

In parallel, maybe. In series, best not to.
Those current ratings are a lie so ignore them. What most determines how closely two batteries discharge together in series is their capacity. If they are the same there's a chance they might keep their voltages fairly close together.

Best to just buy a new pair. No matter what their cost, batteries are dirt cheap considering you get to use them for hours every day for months or even a couple of years.

Thanks Mooch!

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