My old 1340 is in my spare parts closet now as I don't think the lithium battery even works anymore. I suspect it's not worth buying a replacement battery, as the replacement battery would probably be half dead as well from sitting on a parts shelf for years. Am I right?
I'am using a replacement, bought for 35 Euros - it is ok for 2,5 h.
At Slack 21:
Are you using a DSDT?? My bootlist is a yours - beside: UseKernelCache=Yes.
My 1340 has working hibernate. My mode ist 3.
Any problems if you check sleep: pmset -g assertions???