battery pack... The Good, The Bad, and The Ugly

[Dectek]

When it comes to the science of battery discharge and proper charging rates and that whole world I am at a disadvantage. To me a battery is "Charged", "Dead",or "Going dead".
I am switching canisters (building a new housing) from 4+inches Gel Cell to 2-2.5 inch NiMh and was looking for battery packs and ran across this one.
Can I get a couple opinions about this package. I am not planning on using the bottle or wiring. Just cell pack and charger if it looks to be a good deal.
Thanks
BTW...running Halogen

Bicycle Battery Pack

Solo Battery Pack and smart charger at bottom

 

[Rev. Blade]

I'm hoping that's a good battery pack. I just bought one for a cannister light project. So far about all I can tell you about the pack is that it arrived a few days after purchased... so at least BatterySpace seems like a decent online dealer, from that point of view. I'll know more after I get my light built. (The burn time is long past the 10 minutes or less that I've tested it so far.)