Ok, my questionz are, do i need to solder if i have bats with solder tabs already on? 2nd, for the second batt, which will replace my 100 mAh, i don't need solder tabs do I?(to replace the old one) 3rd, im using Buntas page, but if you have more detailed instructions, that would help.
I've never used bats with solder tabs but my understanding (from all the fried bats I have) is that the solder tabs just provide a place to solder instead of directly onto the bats contacts. I don't quite get your second question. Bunta's page has pretty good instructions. If you wanna do a dual cell without solder I recomend the layman's mod, you can find it in the bit science section.