Mixing CR2 and CR123 batteries; yes, or no?

[AllenMcB]

I've got a 2 D cell mag light clone that needs some juicing up. I'm wanting to do this with what I have laying about in the shop.

I've tried matching other batteries to the length of 2 D cells. Three CR123s aren't long enough, four are too long. Three C cells are too long. I don't have any AA adapters.

On a whim, I put two lithium CR2 batteries in line with two lithium CR123s. Almost an exact match in length. Different brands, but both lithium, both 3v.

But then............ I did a search in these forums for the words "mixing batteries". Lots of cautions about mixing chemistries, voltages, used and new, etc. Lots of notes on how this is a bad idea.

So, I'm down to two questions:

1. Can CR2 and CR123 be mixed, two each, since they/re both lithium and both 3v?

2. If the answer to 1. is "no", anyone know of an easy juice-up for a 2 D cell mag light, or am I looking at ordering the 3 AA adapters?

Thanks in advance....

 

[Th232]

The answer is a big no!

From memory the CR2s have a lower capacity, will thus discharge quicker than the CR123, and then probably start reverse charging. This is a very bad thing, the result will be as if you tried to recharge a lithium primary.

3 AA adaptors are one option, or if you can find any two Li-Ions in D cell format are also possible.

 

[jp2515]

The answer is a big no!

From memory the CR2s have a lower capacity, will thus discharge quicker than the CR123, and then probably start reverse charging. This is a very bad thing, the result will be as if you tried to recharge a lithium primary.

3 AA adaptors are one option, or if you can find any two Li-Ions in D cell format are also possible.

As indicated by the previous poster:

DO NOT MIX BATTERIES! An explosion could occur.

 

[AllenMcB]

As indicated by the previous poster:

DO NOT MIX BATTERIES! An explosion could occur.

Thanks, guys. I knew I'd get a good answer.

 

[Fichtenelch]

Never mix batteries, even same size and different charge state is dangerous. using different capacities in a mix is a guarantee to get a nice .

3 Sub-C's should fit a 2D, but maybe you need to trim the spring. 2xD = 60mmx2= 120 mm. Sub-C = 42mm x3 = 126 mm

 

[carrot]

Boom!