Does anybody know if there is a easy way to map the Battery VST drum kit to the QWERTY keyboard in Renoise?
If you use Battery as a VSTi in Renoise than you don’t need to do anything.
If you can’t trigger the samples with Q,W,… try lowering the keys for a few octaves.
If you mean Battery as a standalone… well, that’s not the Battery forum and we don’t give a f*ck!
… just kidding 
You can use the computer keyboard for standalone too. Don’t know the details, tho.
If you mean mapping specific keys to specific samples/cells, you can do that, there’s the option inside Battery (map, or midi learn…), anyway the manual will tell you more.
VST keyboard up octave is assigned to “*” on the number pad. Mi ain’t got no number pad on the lappy and I can’t seem to get another key to assign to Octave Up. So that’s why it is quite important.
Also when I change the keymappings in Battery, they say “C3” but the qwerty don’t play it.
Basically I think this VST is fu**** going through MR QWERT.
out.
I use a laptop too.
For octave up/down I use the keys ‘?’ and ‘pause’.
I don’t really use Battery in Renoise (I use the Renoise sampler), but I tried it now and had to go two octaves lower, so that the key ‘Q’ became the C-3 note.
The C-3 triggered the cell on the top left in Battery.
So yes, it works with the QWERTY.
Analoga Batteria:
are you aware of the fact that you can change the keyboard assignments for octave up/down actions?
Config => Keyb/Mouse
this way, you can choose a more comfortable key assignment for you, as ermi did