I'm considering the XTAR WP2 II charger, but I'm not sure if the batteries will fit and am concerned the charge rate will be too fast. I've read that ideally, you want the charge rate to be half the capacity, so a 650 mah battery should be charged at a rate of 325 mA. Is this a problem? Are there any other chargers in this class that are decent? Pila is too expensive and I don't trust TrustFire due to personal experience.