In reply to obi-wan nick b:
Tried three separate replacement batteries. Only two worked. One I'd charge, leave the camera in my bag for two days, get it out for the first time and the battery would be close to empty. The other one had about enough juice for 100 shots before it died (no flash). Every single replacement battery promised to be "Official Original Sony" e.t.c.
Because of the battery problem, I'd have to take the external charger with me everywhere I went which was enormous and cumbersome (larger than the camera itself not including the plug) - so if flying with minimal luggage it was a nouse.
The other point was that, looking back, I don't think the photos I took with the W300 were THAT much better than the photos I took with my new Xiaomi android phone, but maybe that's just because I've only really looked at them properly on a laptop screen whose resolution is 1370e.t.c.
Post edited at 10:06