Hi! I'm calling out to all Ameda Dual Lactaline Pump users to share with me the brand of rechargeable batteries they are using. Currently I'm using disposable batteries and I find it pricey and cost consuming. I did try to use rechargeable batteries (fully charged for 12 hours) but my pump would not work till i decided to replace with disposable ones. I used the pump frequently at work to express milk and sometimes while expressing the pump just died on me. Very depressing especially when the milk is about to come out and the batteries just went flat. there was no socket in the room im using to express milk. my colleagues who used medela had no problem using rechargeable batteries. I did try to use their batteries but still it wouldnt work on my machine. please share the brand and the specs of the rechargeable bateries you are using and where I could get them. tia!