@ecc1 this is Not a normal battery 3,6V Lithium !!! I had the Dana-R in my hands, the +/- pol contacts all together on front side , not as normal battery on front and end. Please look at the pics. The battery cover had no contacts, the contacts only inside the pump.
I will make today same better pics of the pump and post it here.
The battery problem is most post mistake of the Dana-R pump in german user forums. The battery is only get from distributor IME-DC in germany. Many of his batterys has not 100% charge. Today the distributor change on warranty all bad batterys, but the shipping is annoying time.
By the way - I found some other bad points of the Dana-R. The swiss micro dc makes at working a very high frequency noise. The pump works in 4 minutes steps, if I want to go sleep I hear this annoying noise.
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