What's your experience with Hong Kong replacement batteries - good or bad?

The BP-4L battery I just bought on eBay from a Hong Kong dealer has two problems.

1. One of the connectors wasn't making good contact. This was easily fixed.

2. When the battery is charged in the N810, it shows fully charged, but the battery status says 4 days / 3 hours, and battery-status reports 43% full.

Should I give Hong Kong another try, or give it up?