I have tried two sets of AAA Energizer 900mAh rechargeable batteries with two different chargers but for some reason my remote will not get the signals from the transmitter after just a few minutes (I have to move the remote to within 3 feet to update temps). I can install just store bought batteries & the ET-73 works fine (I can be in the house with the remote & it updates) and these batteries will last 4 or 5 12 hr smokes. Any ideas on what is going on ? What kind of rechargeable batteries and/or charger & where to buy? By the way, my son uses the same chargers/AA batteries with his XBOX controllers & they last a long time. Just seems strange my Maverick doesn't like rechargable batteries.