Yes that is just another name for the same battery I was talking about, the difference is you are trying to run a pi3 from them and use wifi you have already found a 7805 voltage regulator which can supply about 1A is not able to power your pi, so with a DC-DC buck converter you are going to be drawing around 1.5A to power your pi and the wifi your batteries wont last long, my pi was probably drawing nearer 0.5A and the batteries last 20 min max. if you want a reasonable usage time for your robot look at the 5V rechargeable power banks for powering your pi.smcras wrote: ↑Wed Aug 09, 2017 11:11 pmThanks for the info.
The batteries are a cheap no name product. The package says "9V E-Block 6LR61" by TOP Craft. I cannot find any infos about these batteries, not even how much capacity they have. So I just ordered a DC-to-DC converter to try it out. They will be delivered in two days.
If your Raspberry Pi could run 20 mins with 2x batteries and the motors can run with only 1x battery, I assumed, that it should work out. I have also seen other robots with Raspberry Pi and 6x 1.5V batteries connected in a row on the internet. I cannot tell which configuration is better, my assumption was that the batteries connected in parallel would have less load. I'm not very investigative when it comes to power supplies.