A few days ago, after an overnite full-charge, my original N800 battery began complaining for a recharge after only a few of hours off the charger. It was idle, the display dimmed, & the screen/keys locked. I re-tried a couple of times, & another charger, & got the same results.

So I bought the Nokia battery on Amazon from CCMAccessories for $16.69. It was listed as new, and came in an official looking Nokia blister pack. The battery itself looks official, Li-Polymer, BP-5L, 3.7v, has the Nokia logo hologram sticker, etc.

After an overnight full-charge, I'm getting the same results as with my original battery. I have two Nokia 5v chargers. Same results.

Any ideas?