Topic: Novena Battery Thread
What battery would be suitable.
I concluded that the kind of battery has different connections for the load and for charging, because each cell needs to be controlled seperatey. In the schematics I found mention of 3S or 4S at the charging connector. So I found something at conrad that might look like the kind of batteries the bb is for and for novena you could use 3 or 4 cel batteries.
So just a question (because I do not know much about this kind of batteries). Would this kind battery from lipo accupack, conrad ( https://www.conrad.nl/nl/lipo-accupack- … 8182.html) be suitable? The capacity would be near what some bigger tablets have, but it looks like it could supply way more current as needed for the novena (probably more for powering some small flying thing for a short period).
Any 2/3/4-cell Lithium Ion/Polymer battery should work, so long as you can physically connect it to the Novena. That one you link to would need a connector for the battery terminals (to physically connect it to the Senoko), but the charging taps (for making sure the individual cells charge evenly) should plug right in.
30C discharge is probably overkill, though. My rough calculations are that the Novena will draw ~14 W at the maximum (3W for maxed out CPU/RAM, 6.4 W for LCD at max backlight, ~3.2 W for a maxed out SSD, 90% efficient regulation). I'm not sure what workload would even sustain that. I suppose WiFi and USB peripherals would bump it up a bit.
At 14.8V (4S), that's under 1A of discharge from the battery, or ~0.2C. So you could probably save some money by getting a similar battery rated for a much lower discharge rate. RC batteries tend to be rated for high discharges, though, so maybe that's not so easy to do.
Here's one from the same site that's cheaper (presumably due to the lower discharge rating, though I don't know. I'm using a Google Translate'd version of the pages so...), and theoretically just as suitable for Novena use: https://www.conrad.nl/nl/lipo-accupack- … 39529.html
I'm personally planning on making my own battery pack out of 18650 cells.
That battery looks too expensive... also, it won't fit inside the Novena case!!
The interior height of the novena (correct me if I'm wrong) is 20mm, so you will need a slim battery.
In the Novena photos you can see the brand "turnigy nano-tech" so I guess that would be a safe bet. But probably there won't be any 4S battery that fits, it will have to be 3S (many 3S batteries are more than 20mm in height so check it before buying!).
I'm planning on using 6 18650 batteries in a 3S2P configuration on a custom designed battery holder
In the interest of not hijacking the battery board thread, a discussion on batteries.
@ballanux: Do you have schematics or anything for your battery holder? My plan right now is to spot-weld tabs on my cells, but if you have some snazzy design, I might like to use it... especially since I don't have a spot welder right now.