Minolta Maxxum 7D and generic lithium batteries

I just bought a Konica Minolta 7D and wanted to get some spare
batteries (NP-400). I see plenty of generic lithium batteries at about
1/3 the price of the Konica Minolta version. From what I have read in
general, I gather that some generic lithium batteries can be as good as
the manufacturer-supplied version, but some cheaply made ones can be
weaker or even downright dangerous. Has anybody had experience with any
particular generics? Any recommendation as to what to get or what to
avoid?

Also, I have seen some of the Minolta NP-400 batteries labeled as being
for the Dimage A1 and A2, and others as advertised for the A1, A2, 7D,
and 5D. For example, Amazon lists both, but the A1-A2 version is $5
less. I assume these are exactly the same batteries, and that some that
were made before the 7D and 5D came out just don't refer to them. Is
that correct?

Mark Cutler