Question regarding marrying / divorcing battery's

[Craigo121]

Hi all,

Past few months I've been using the rx200 as my main mod and have 3 different sets of triple married battery's for that mod specifically.

I'm about to buy a dual 18650 mod (either the fuchai 213 or the cuboid 150w) for the smaller form factor for when I'm out and about.

Will be buying new battery's for it to be married as a pair of 2 but was wondering if I would be able to take 1 of the married sets for the rx200 take 2 battery's out from it (use the 3rd for a single battery mod) and use it in the dual battery mod?

Technically those 2 out of 3 battery's are still married?

Cheers for any advice!

Peace [emoji100]

Sent from my D6603 using Tapatalk

 

[DaveP]

I don't see a problem with that as long as keep them together and you don't use them again in the RX200 as a triplet set or swap the single one in and out of the married pair mod. Mark the two as a pair.

The RX200 and RX00S claim to monitor battery voltage and let you know if one or more aren't matched. I have an RX200S, but haven't had it notify me of a battery fault yet. You can monitor the voltage by turning it off with 5 fire button presses and then once it's off, press all three buttons at the same time and hold them until the voltages are displayed. That takes about 7 seconds. If yours is like mine it will always show the center reading lower than the other two. If I then take mine out and measure voltage on each battery they all read exactly the same. Something apparently is not right with Wismec's battery meter.

The reason for marrying batteries is to create a pair or a triplet of batteries that charge and discharge at the same rate. Their voltages will closely match as they are charged and then discharged under load. Batteries in a circuit, like buckets of water connected with a hose, tend to drain from one to another until the levels are equal.

What you don't want is a battery that drains quicker than another in a pair. When that happens reverse charging can occur from one battery to the other, and that can lead to overheating and catastrophic battery death. Usually, that means heat, followed by expansion of gases and electrolyte, which is soon followed by the case rupturing and spewing out hot chemicals. Sometimes, they explode like a firecracker if the case isn't letting out pressure as it builds.

It's best to buy new batteries, mark them with a code that means they are in a paired in a set, and always use them together. You can separate the set and use them in single battery mods, but you shouldn't do that and then use them again as a matched pair.

You can check the compatibility of matched pairs from a dual battery mod by using a charger that displays voltage as they charge. They should both stay at the same voltage as they charge and should come out of a mod with the same voltage after use. Even new batteries will sometimes vary a tenth of a volt while charging, but a good pair will match pretty much consistently throughout charge and discharge.