i picked up a pack of these, along with the 2100mah charger, earlier in the week. i'll let you know how they fair with my d100. i also grabbed a pack of the energizer 9v nimh rechargeables for my sonosax.
just set up a little test in front of my stereo here at home using energizer rechargeable batteries, 9v (7.2v) 150mAh in my lemosax and AA 2100mAh in my d100... after 3 hours of recording both are sill going strong. the d100 has two power bars remaining and the sonosax is reporting low power (1-sec led flashing), although it had been doing this since the start of recording.
i'm thinking the lemo-modded sonosax draws a lot less power than a standard sax, hence the reason i'm able to get 3+ hours out of it with 7.2v 9v batteries, anyone?