R' MB:<br>>>Does the above mean that the CI was only talking about AC appliances? That<br>>>battery powered devices, with no cibur laqarqa wouldn't be boneh? In which<br>>>case, how would a battery powered calculator (no filaments, no chibur laqarqa,
<br>>>can't be considered a keli zemer) wouldn't be a problem?<br> The Chazon Ish states that he is even talking about portable devices. See his replies<br>to RSZA, printed in Michas Shlomo, where he says that electricity is considered 'binyan gamor,'
<br>and therefore is prohibited even in keilim, where we would otherwise say ain binyan bekeilim.<br> <br> Mike Wiesenberg