Extech BATT-36V-C  

BATT-36V-C: 3.6V Lithium Battery (C-Size)

Li-SOCl2 replacement battery

Primary, C-size bobbin cell, non-rechargeable battery. It contains non-flammable electrolyte and is UL recognized. Durable battery used on most meters that accept C-size batteries. Sustains battery life more than 10 years depending on application use. Provides higher power and energy and has superior drain capability.