Battery

I’ve been looking for a Compaq battery for a while now and I can’t seem to find it. I’m pretty sure it’s because it is one of the oldest model, it could be phase out already. But then again, a friend shared me a link where I can find the widest selection of batteries from of any brands and whatever kind. She had her Lenovo ThinkPad T400 7417 Laptop Battery from there accordingly it’s very affordable. Wish I can find one for my good, old, favorite laptop. If not, then maybe I can just grab a couple of camera batteries cause I badly need some spares.