howto charge battery outside n900 without cradle
 

Hi,
my battery has gotten totally flat, so that it will not load inside the N900 any more. I don't think I want to buy a cradle for charging outside the phone when I just want to kickstart enough juice in the battery to get it loading again.

My question: given a charger with 5.2 Volts, which lead should I connect to which of the three contacts at the battery?

Paai.