I bought 2 battery (LP-E6) and a battery grip (BG-E7) from RowaJapan so I can use it on my 7D. The battery operating hours is quite impressive for a replacement battery. The battery status can be recognized on my 7D without any problem or whatsoever. When charging, the battery charger blinks the way that it should be on normal operations. To cut it short, this battery is a good replacement for the Canon LP-E6. It is reliable and it is currently the most affordable one you can get on Amazon Japan.
Update: "battery not recognized" error occurred a couple of times on my 7D during testing using my RowaJapan`s BG-E7. It occurred when I tried to use mixed batteries (eg. Canon LP-E6 + RowaJapan LP-E6), but no problem at all when I tried 2 x RowaJapan LP-E6.