Transistors

So far in my bots Ive been reusing the same 2 transistors that I got with my original ARDX kit.

 According to http://oomlout.co.uk/starter-kit-for-arduino-ardx-p-183.html

Im using these:-

http://en.wikipedia.org/wiki/2N2222

A “NPN bipolar junction transistor used for general purpose low-power amplifying or switching applications”.

 I’m using them as switches for my motors BUT I think the power is too high for these transistors.

(At the moment I’m powering my bot with 4xAAs) and the motors often stay stuck on instead of switching on & off.

But I’ve just bought these Battery Packs to lower the power a little:-

http://cpc.farnell.com/pro-power/23vb31b/battery-holder-3xaa-snap/dp/BT03710?in_merch=Featured%20Products

But I need to go back for these snap-on battery connectors:-

http://cpc.farnell.com/pro-power/440005p/snap-on-battery-connector-pp3-10pk/dp/BT02187?crosssellid=BT02187&crosssell=true&in_merch=true&

and Im wondering which of these would be suitable for my use?

tranny

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