T39m with crappy battery?

[CountMagistus]

Hello all,

I just bought an Ericsson T39m and I'm really happy about it so far except 1 thing wich worries me.
According to information everywhere, the phone should have a standby-time of approximately 300 hours. So I wanted to check this since there is that handy overview of remaining standby and talk time and I fully charged my phone (for the third time since buying it) when it was turned off. When I put it on again and directly checked how much standby time I had left it displayed that I had only 228 hours left. This was yesterday (23th of April 2002 at exactly 18:00 hours +1.00 GMT) an now (24th of April 2002 at exactly 13:06 hours +1.00 GMT) it shows I've got only 190 hours of standby left. I didn't make a lot of phonecalls or received/sent a lot of messages so I'm really wondering if this gets better in time or if I should ask for a new battery. I know that it also depends on what network you're using (it's a 1800 mhz) but this is a bit extreme (a difference of 72 hours hen fully loaded) from my point of view. I also don't have that wonderword (or whatever it's called in English) option activated nor my IrDa connection enabled and I don't use GPRS...so what's next? get a new battery from the shop or reload some more times and see how it goes?
Thanks in advance for any usefull information provided!