If you want to use a soldered tab variant, you'll have to buy a 1/2AA with them soldered on at the supplier or someone with a rig to spot weld them. While I was at Batteries Plus+ looking for some 1200mAh AAAs I noticed they had a solder tab welder (the gent said it was $2K) so they may be able to help you. I did buy my 1/2AA from them. You can also rig up your own spot welder.

Once you get the solder tabs installed then it's play time. However I'd advise a holder if you can.

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