A 2V battery forward blases a diode however there is a drop of 0.5 V across the diode which is independently of current. Also a current greater then 10 mA produces large
10 Values Zener Diode kit 1n4738~1n4748 1W 1n/4739a/4740a/4741a/4742a/4743a/4744a/4745a/4746a 8.2/9.1/10/11/12/13/15/16/18/22/v - Price history & Review | AliExpress Seller - Manufacturer of Module Store | Alitools.io
DIODE P/N D85R120 | CEHCO
Source 1N4740A 1N4740 Power Zener Diode 1W 10V DO-41 (DO-204AL) Axial 1 Watt 10 Volt IN 1N 4740A IN4740A on m.alibaba.com