Bas Wijnen wrote: > You have to design the case anyway. I would expect that the case is the > battery holder, so you only need to insert the contacts.
The tricky bit is finding suitable contacts. Well, since I hadn't picked contacts just yet, I went on a search ... I found five different types: 1) PCB-mounted, SMT. Alas, they all have the battery above the contact, not on the side. A side-facing contact would be very nice to have, also solving the issue of how the battery contacts connect to the PCB. For AAAA, this exists: http://www.battery-contacts.com/part.php?pn=BK-6113 Alas, they're too small to even try with AAA. 2) PCB-mounted, through-hole. Some are fairly bulky and some seem to be just contacts used in battery holders with a plastic base, e.g., Holder (1075): http://www.keyelco.com/product.cfm/product_id/14043 Positive contact (1075-1): http://www.keyelco.com/product.cfm/product_id/14196 Negative contact (1075-2): http://www.keyelco.com/product.cfm/product_id/14211 These might actually fit. Alas, the 1075-2 is completely undocumented. 3) Slide-in. They slide into a slot in the case. There are several types of terminals. In our case, we'd need cables. Example: http://www.keyelco.com/product.cfm/product_id/891 4) Snap-on. Similar to slide-in, but they snap over a wall in the case. Example: http://www.keyelco.com/product.cfm/product_id/874 I also found something quite remarkable, bare contacts for coin cells: http://www.digikey.com/product-detail/en/keystone-electronics/120TR/36-120CT-ND/5872901 http://www.digikey.com/product-detail/en/keystone-electronics/112TR/36-112TR-ND/4499393 I've been wondering for years why the industry didn't offer something as simple as this as an off-the-shelf product. Now it finally does. Next, details. - Werner _______________________________________________ Qi Hardware Discussion List Mail to list (members only): [email protected] Subscribe or Unsubscribe: http://lists.en.qi-hardware.com/mailman/listinfo/discussion
