Testing rechargeable batteries in my 06044M sensors. I purchased EBL 1100mHa batteries for my sensors. These are Low Self Discharge Ni-MH batteries. I know that Acurite does not recommend using rechargeable batteries but I have done the research and I think these are going to work fine. So far they are working fine. The display on the sensors shows that the batteries are not fully charged but that is because rechargeable batteries are 1.2v where alkaline's are 1.5v to start, This does not affect the report on myacurite... they are still showing good. The power curve on the rechargeable batteries is better than what alkaline batteries offer. I think that that battery chemistry has really improved over the years and warrants a second look. I did purchase a Opus Charger so that I can tell exactly how the batteries are preforming. I did this because we spend $80 a year on batteries and see this as an opportunity to save some money.