Replacing cordless drill battery pack Asus A53TA batteries

[dongshan]

Okay, so I have a cordless drill and one of the battery packs went dead and I'm attempting to replace the batteries in the pack. I've read a few forums online and found that even an amateur can do this pretty simple. However, I do have a few questions that I wasn't able to find out.

The batteries in my pack are labeled " Asus A53TA ". From what I found this is a 1.2v Ni-Cd sub-c class battery and the S means high capacity (mAh?) and quick charging. However, I can't find much about this specific battery, like how many mAh it actually has.

1. My first question is, where could I find the specs for this specific battery or what is a good mAh for a cordless drill? I've seen them up to 2500, maybe higher.

2. I found many batteries setup to make into a battery pack with the tabs already included. My other question then, is can I just solder the tabs to the other battery or is there some other kind of "weld" or adhesive I should use? Maybe someone has done this already and suggests a good battery I can use? more detials : http://www.batterietutti.com/asus-a53ta.html

Thanks in advance!